Big Friend addition

Abacus level 1: How to Do the Big Friend Addition formula?

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Abacus Big Friend Addition Formula: Today welcome to the interesting part of Big Friend Addition Formula of Abacus Level 1.
If you have ever thought about doing mental calculations then you have come to the right place.
In this Big Friend Addition Formula of Abacus Levels blog, we will take you deep into Abacus Level 1 and explore and learn 9 techniques of Big Friend Addition Formula.
Whether you are a student, teacher or parent who wants your children to learn valuable skills, you can learn our full Abacus course free online and teach it to your children.
So let’s start this part of Big Friend Addition Formula…

Big Friend Addition
Big Friend Addition

Big Friend Addition : Formula Chart

Technique no. 1+ 9 = – 1 + 10
Technique no. 2+ 8= – 2 + 10
Technique no. 3+ 7= – 3 + 10
Technique no. 4+ 6= – 4+ 10
Technique no. 5+ 5 = – 5 + 10
Technique no. 6+ 4 = – 6 + 10
Technique no. 7+ 3 = – 7 + 10
Technique no. 8+ 2 = – 8 + 10
Technique no. 9+ 1 = – 9 + 10

Worksheet-1 Abacus Big Friend Addition +9=-1+10【1D3R】

Abacus Big Friend Addition   + 9 = – 1 + 10

123456789101112131415
2
2
9		6
9
4		3
9
5		5
3
9		2
5
9		7
2
9		9
-3
9		9
9
1		4
-3
9		8
-2
9		1
9
1		1
2
9		1
3
9		3
-9
2		2
9
2
               
161718192021222324252627282930
3
9
1		4
5
9		3
6
9		2
7
9		8
9
1		8
-7
9		5
3
9		8
-2
9		4
9
6		7
2
9		2
6
9		7
9
-5		7
-6
9		2
5
9		3
9
-2
               
313233343536373839404142434445
1
9
9		2
9
9		3
9
8		4
9
7		5
1
9		2
2
9		1
1
9		6
3
9		9
9
1		5
1
-5		1
6
9		3
1
9		9
2
9		3
4
9		3
3
9
               

Abacus Big Friend Addition 【1D3R】   + 9 = – 1 + 10 ANSWER SHEET

A Row123456789101112131415
Ans.13191717161815191015111213-413
B Row161718192021222324252627282930
Ans.131818181810171519181711101610
C Row313233343536373839404142434445
Ans.19202020151311181911613201615

Worksheet-2 Abacus Big Friend Addition +9=-1+10【1D4R】

Abacus Big Friend Addition   + 9 = – 1 + 10

123456789101112131415
3
9
5
-7		4
5
9
-6		3
1
9
1		6
3
9
-3		9
9
1
-9		8
9
9
3		7
2
9
9		5
3
-7
9		3
6
-8
9		1
3
5
9		9
9
9
9		1
9
5
-1		5
-4
9
1		3
9
9
4		8
9
9
4
               
161718192021222324252627282930
4
6
4
9		6
9
-1
9		2
9
4
-1		7
8
-1
9		7
9
-4
9		4
5
9
5		2
8
4
9		9
9
9
4		5
-3
9
9		3
8
9
4		8
9
-3
1		1
6
9
-2		6
3
9
9		5
-2
9
3		1
8
9
-4
               
313233343536373839404142434445
8
9
-3
1		3
3
9
-4		6
9
-4
9		2
6
9
9		9
8
9
4		4
9
9
9		7
8
-2
9		8
8
9
5		5
-2
9
4		1
7
9
-3		7
8
-4
9		2
9
9
3		6
2
9
1		3
7
1
9		9
6
-4
9
               

Abacus Big Friend Addition +9=-1+10【1D4R】ANSWER SHEET

A Row123456789101112131415
Ans.101214151029271010183614112530
B Row161718192021222324252627282930
Ans.232314232123233120241514271514
C Row313233343536373839404142434445
Ans.151120263031223016142023182020

Worksheet-3 Abacus Big Friend Addition +8=-2+10【1D3R】

Abacus Big friend Addition   + 8 = – 1 + 10

123456789101112131415
4
8
5		6
2
8		2
8
6		7
8
-5		6
2
8		4
8
6		5
4
8		9
-7
8		8
8
3		7
8
4		2
8
2		1
2
8		2
8
3		2
8
6		2
8
7
               
161718192021222324252627282930
1
1
8		2
2
8		3
5
8		5
2
8		5
3
8		9
8
-6		4
8
-2		6
1
8		3
1
8		9
8
-5		8
1
8		2
1
8		9
8
2		3
6
8		8
8
-6
               
313233343536373839404142434445
2
8
8		1
3
8		7
8
3		2
2
8		2
6
7		4
4
8		4
8
8		7
8
-5		2
8
5		1
1
8		3
1
8		2
8
6		2
6
-8		1
6
-5		8
2
8
               

Worksheet-3 Abacus Big Friend Addition +8=-2+10【1D3R】ANSWER SHEET

A Row123456789101112131415
Ans.171616101618171019191211131617
B Row161718192021222324252627282930
Ans.101216151611101512121711191710
C Row313233343536373839404142434445
Ans.1812181215162010151012160218

Worksheet-4 Abacus Big Friend Addition +8=-2+10【1D4R】

Abacus Big friend Addition + 8 = – 2 + 10

123456789101112131415
8
8
-2
8		4
8
8
1		6
4
4
8		3
8
4
-1		3
7
4
8		8
7
-1
8		5
5
9
8		1
7
8
5		4
8
3
-2		7
8
2
8		9
8
-3
2		2
8
5
-1		3
2
-1
8		7
8
-1
8		4
7
1
8
               
161718192021222324252627282930
2
3
-1
8		9
8
5
3		5
-1
8
3		8
2
2
8		1
6
8
-3		6
-3
8
4		4
5
8
-3		8
-4
8
8		1
6
1
8		7
-3
8
8		3
4
8
-1		6
5
1
8		2
5
8
-1		9
8
-3
1		5
2
8
-1
               
313233343536373839404142434445
3
6
8
2		9
8
1
-2		2
8
1
2		8
8
2
8		6
-3
8
3		5
-2
8
4		4
3
8
-4		8
8
3
8		3
8
7
8		8
8
-3
8		5
2
8
-1		6
3
8
8		7
1
8
-3		9
8
-2
8		2
6
8
-2
               

Worksheet-4 Abacus Big Friend Addition +8=-2+10【1D4R】ANSWER SHEET

A Row123456789101112131415
Ans.222122142222272113251614122220
B Row161718192021222324252627282930
Ans.122515201215142016201420141514
C Row313233343536373839404142434445
Ans.191613261415112726211425162314

Worksheet-5 Abacus Big Friend Addition +7=-3+10【1D3R】

Abacus Big Friend Addition + 7 = – 3 + 10

123456789101112131415
4
7
2		5
3
7		6
3
7		7
2
7		9
7
3		3
6
7		3
7
3		8
7
2		9
7
-6		4
7
-8		2
6
7		4
7
2		3
7
3		5
3
7		2
1
7
               
161718192021222324252627282930
3
7
3		6
3
7		3
6
7		2
2
7		8
7
4		3
7
9		9
-1
7		3
7
2		3
7
8		4
7
3		8
1
7		5
4
7		9
7
-6		4
7
8		8
7
3
               
313233343536373839404142434445
3
7
7		1
3
7		2
6
7		3
7
3		1
2
7		8
7
-5		4
7
-1		4
4
7		6
-5
7		2
7
4		1
7
7		2
7
-7		4
5
-7		3
1
7		7
3
7
               

Abacus Big Friend Addition +7=-3+10【1D3R】ANSWER SHEET

A Row123456789101112131415
Ans.131516161916131710191513131510
B Row161718192021222324252627282930
Ans.121316161119191518141616101918
C Row313233343536373839404142434445
Ans.1715131010101581315152161117

Worksheet-6 Abacus Big Friend Addition +7=-3+10【1D4R】

Abacus Big Friend Addition   + 7 = – 3 + 10

123456789101112131415
7
9
2
7		3
6
7
2		7
2
7
-5		7
8
4
7		9
-1
7
-5		6
3
7
-1		8
7
4
-3		2
2
7
-1		2
5
-1
2		4
-1
7
5		9
7
4
1		1
4
7
3		6
-2
7
4		4
7
5
5		8
7
1
1
               
               
161718192021222324252627282930
2
3
4
7		5
5
3
7		3
7
5
-1		7
-3
6
1		3
7
4
3		7
1
7
-1		5
4
7
-1		2
7
7
4		9
7
-2
1		1
8
7
-1		4
7
3
1		5
-2
1
6		6
4
3
7		7
2
7
-4		4
2
2
7
               
               
313233343536373839404142434445
6
-3
4
1		3
1
6
2		7
2
6
-1		3
5
7
-1		8
-1
-3
4		2
6
7
-2		9
7
-3
4		5
5
4
7		1
4
4
7		9
5
4
7		3
4
1
7		7
-6
2
7		2
3
3
7		8
5
7
1		6
2
7
-1
               
               

Worksheet-6 Abacus Big Friend Addition +7=-3+10【1D4R】ANSWER SHEET

A Row123456789101112131415
Ans.25181126101516108152115152117
B Row161718192021222324252627282930
Ans.162014111714152016151510201215
C Row313233343536373839404142434445
Ans.8121514813172116251510152114

Worksheet – 7 Abacus Big Friend Addition + 6 = – 4 + 10【1D3R】

Abacus Big Friend Addition   + 6 = – 4 + 10

123456789101112131415
7
2
6		4
6
5		9
-5
6		3
6
6		1
3
6		2
8
4		4
6
3		9
-4
3		6
3
-5		9
6
1		4
5
6		5
4
6		3
1
6		2
2
6		7
2
6
               
161718192021222324252627282930
8
1
6		6
3
6		1
3
6		2
6
9		4
-3
9		3
6
6		4
5
6		1
8
6		4
6
1		3
1
6		2
7
6		3
6
6		2
2
6		7
2
6		1
3
6
               
313233343536373839404142434445
9
-5
6		4
6
5		7
2
6		5
4
6		4
5
6		5
3
-6		7
2
-6		5
-5
4		4
6
4		9
6
3		2
2
6		1
3
6		6
-2
6		1
2
6		5
5
6
               

Worksheet – 7 Abacus Big Friend Addition + 6 = – 4 + 10 【1D3R】ANSWER SHEET

A Row123456789101112131415
Ans.15151015101413104161515101015
B Row161718192021222324252627282930
Ans.151510171015151511101515101510
C Row313233343536373839404142434445
Ans.10151515152341418101010916

Worksheet – 8 Abacus Big Friend Addition + 6 = – 4 + 10 【1D4R】

BIG FRIEND POSITIVE   + 6 = – 4 + 10

123456789101112131415
12
2
6
2		7
2
6
4		4
6
8
-3		4
6
3
3		6
3
6
-1		6
-2
6
9		1
8
6
-4		6
-4
7
6		4
6
9
6		4
6
4
6		9
6
4
6		9
6
-5
3		4
6
2
3		6
3
6
-3		9
6
-2
4
               
161718192021222324252627282930
4
6
4
2		2
2
6
6		4
6
5
3		5
5
4
6		9
1
4
6		6
3
-1
-7		7
2
6
4		4
6
8
-3		4
6
3
3		6
3
6
-1		6
-2
6
9		1
8
6
-4		6
-4
7
6		4
6
9
6		4
6
6
4
               
313233343536373839404142434445
39
6
4
6		18
1
6
2		29
6
7
8		65
4
6
-5		38
7
-5
6		30
4
-3
6		59
-5
6
7		44
6
8
8		73
9
2
6		58
7
-5
6		27
9
3
6		72
5
2
6		21
8
-5
6		85
4
6
-5		32
-2
4
6
               

Worksheet – 8 Abacus Big Friend Addition + 6 = – 4 + 10 【1D4R】ANSWER SHEET

A Row123456789101112131415
Ans.221915161419111525202513151217
C Row161718192021222324252627282930
Ans.16161820201191516141911152520
D Row313233343536373839404142434445
Ans.552750704637676690664585309040

Worksheet – 9 Abacus Big Friend Addition + 5 = – 5 + 10 【1D3R】

Abacus Big Friend Addition  + 5 = – 5 + 10

123456789101112131415
5
3
7		6
3
5		8
5
6		9
5
7		5
3
5		4
6
5		7
-2
5		5
5
5		2
2
5		3
5
-8		5
5
4		5
4
5		5
5
1		6
5
1		7
5
2
               
161718192021222324252627282930
8
5
1		9
5
-2		9
-1
5		8
-2
5		7
-2
5		4
5
5		9
-3
5		8
5
5		2
5
5		8
5
7		7
5
6		8
-2
5		3
3
5		8
-3
5		9
5
-3
               
313233343536373839404142434445
1
5
-5		5
4
-5		5
5
1		2
3
5		5
5
3		1
5
3		3
5
5		6
5
-1		4
3
5		5
5
4		4
4
5		1
2
5		15
4
-5		2
4
5		5
4
3
               

Worksheet – 9 Abacus Big Friend Addition + 5 = – 5 + 10 【1D3R】ANSWER SHEET

A Row123456789101112131415
Ans.1514192113151015901414111214
B Row161718192021222324252627282930
Ans.141213111014111812201812111011
C
Row		313233343536373839404142434445
Ans.14111013913101214138141112

Worksheet – 10 Abacus Big Friend Addition + 5 = – 5 + 10 【1D4R】

Abacus Big Friend Addition  + 5 = – 5 + 10

123456789101112131415
3
6
-8
5		7
5
8
5		8
-7
6
5		7
8
5
6		5
4
9
5		6
3
5
7		2
7
5
8		9
5
7
6		5
5
7
-5		2
7
-5
-3		9
5
1
5		4
1
5
1		6
5
4
5		3
2
5
1		8
2
5
5
               
161718192021222324252627282930
5
5
9
1		2
3
5
1		7
4
4
5		1
7
5
2		7
5
4
-3		2
4
5
4		5
4
5
1		9
5
4
5		1
5
5
4		6
5
5
-4		8
-6
3
5		3
3
5
4		4
2
5
4		6
3
5
2		3
5
5
4
               
313233343536373839404142434445
8
1
5
1		4
3
5
3		7
-4
5
5		2
5
5
3		9
5
5
2		1
6
5
3		5
3
5
2		6
-2
5
5		2
6
5
3		9
-6
4
5		7
5
5
3		4
5
5
4		7
4
4
1		3
6
5
1		5
2
5
3
               

Worksheet – 10 Abacus Big Friend Addition + 5 = – 5 + 10 【1D4R】ANSWER SHEET

A Row123456789101112131415
Ans.6251226232122271212011201120
B Row161718192021222324252627282930
Ans.201122151315152315121015151617
C Row313233343536373839404142434445
Ans.151513152115151416122018161515
                

Worksheet-11 Abacus Big Friend Addition + 4 = – 6 + 10 【1D3R】

Abacus Big Friend Addition   + 4 = – 6 + 10

123456789101112131415
3
6
4		5
3
4		8
1
4		7
-1
4		2
7
4		6
2
4		8
-1
4		7
4
8		1
7
4		9
-1
4		4
5
4		3
6
4		5
4
4		7
2
4		6
4
9
               
161718192021222324252627282930
2
7
4		4
6
7		9
-2
4		3
5
4		1
5
4		2
4
4		4
2
4		5
1
4		6
4
1		3
5
4		5
2
4		3
6
4		5
3
4		1
7
4		8
8
4
               
313233343536373839404142434445
5
3
4		8
1
4		7
-1
4		2
7
4		8
-2
4		8
9
4		3
5
4		9
4
-3		1
8
4		9
-1
4		6
4
5		3
3
4		2
4
4		1
5
4		3
4
4
               

Worksheet – 11 Abacus Big Friend Addition + 4 = – 6 + 10 【1D3R】ANSWER SHEET

A
Row		123456789101112131415
Ans.131213101312111912121313131319
B
Row		161718192021222324252627282930
Ans.131711121010101011121113121220
C
Row		313233343536373839404142434445
Ans.121310131021121013121510101011

Worksheet – 12 Abacus Big Friend Addition + 4 = – 6 + 10 【1D4R】

BIG FRIEND POSITIVE   + 4 = – 6 + 10

123456789101112131415
4
5
4
7		2
7
-3
4		7
2
4
8		8
-2
4
7		9
9
-8
4		7
4
6
-2		9
-4
3
4		3
6
-8
3		7
4
8
-6		2
2
8
5		3
6
4
4		6
-4
6
4		1
8
4
4		8
2
6
4		4
1
1
4
               
161718192021222324252627282930
9
1
6
4		2
3
1
4		7
4
4
-1		5
-1
5
4		6
-4
5
4		9
2
6
4		2
4
4
4		5
-4
7
4		7
2
4
2		1
6
4
4		3
3
4
3		8
4
4
4		4
4
4
-1		6
-3
5
4		4
1
2
4
               
313233343536373839404142434445
7
3
9
4		2
6
4
3		9
4
2
1		3
1
5
4		8
1
4
2		1
5
4
1		5
4
4
3		6
4
5
-3		1
4
4
4		8
4
4
-2		5
-4
8
4		3
2
1
4		7
4
4
1		2
3
3
4		9
-6
5
4
               

Worksheet – 12 Abacus Big Friend Addition + 4 = – 6 + 10 【1D4R】ANSWER SHEET

A
Row		123456789101112131415
Ans.20102117141412418171712172010
B
Row		161718192021222324252627282930
Ans.201014131121141215151320111211
C
Row		313233343536373839404142434445
Ans.231516131511161213141311161215

Worksheet – 13 Abacus Big Friend Addition + 3 = – 7 + 10 【1D3R】

Abacus Big Friend Addition   + 3= – 7 + 10

123456789101112131415
1
6
3		2
7
3		5
3
3		8
-1
3		9
3
-1		6
2
3		9
-1
3		7
3
5		7
2
3		8
3
2		2
5
3		4
5
3		2
7
3		9
3
9		8
7
3
               
161718192021222324252627282930
8
-3
5		3
6
7		3
5
3		2
2
-3		7
2
3		3
6
3		5
3
3		7
3
1		2
5
3		1
6
3		4
3
3		1
7
3		9
-1
3		2
6
3		2
7
3
               
313233343536373839404142434445
8
-1
3		9
3
-1		8
1
3		6
3
3		9
-3
-2		8
3
2		7
1
3		8
3
2		7
2
3		7
3
5		3
2
2		7
3
3		4
3
3		8
-1
3		6
2
3
               

Worksheet – 13 Abacus Big Friend Addition + 3 = – 7 + 10 【1D3R】ANSWER SHEET

A
Row		123456789101112131415
Ans.101211101111111512131012122118
B
Row		161718192021222324252627282930
Ans.10161111212111110101011111112
C
Row		313233343536373839404142434445
Ans.1011121241311131215713101011

Worksheet – 14 Abacus Big Friend Addition + 3 = – 7 + 10 【1D4R】

Abacus Big Friend Addition   + 3= – 7 + 10

123456789101112131415
8
8
3
7		3
5
-3
4		7
3
8
-6		6
9
4
-3		4
6
8
-7		2
7
3
-2		6
3
9
-5		4
-3
7
3		3
7
3
6		2
7
3
2		6
3
3
3		9
3
2
3		1
7
3
5		4
5
3
3		7
3
5
-1
               
161718192021222324252627282930
2
3
4
3		5
3
3
4		8
2
8
3		3
2
4
3		4
3
3
7		6
2
3
4		8
2
9
3		3
3
3
3		9
3
2
-1		2
4
3
3		7
3
1
4		1
8
3
3		5
4
3
3		4
4
3
-1		2
7
3
3
               
313233343536373839404142434445
7
3
5
-2		1
8
3
6		5
2
3
2		8
2
7
3		4
3
3
2		9
1
9
3		6
2
3
8		4
5
3
4		9
1
8
3		3
4
3
7		5
2
3
4		7
3
5
-3		1
4
4
3		6
2
3
6		2
7
3
4
               

Worksheet – 14 Abacus Big Friend Addition + 3 = – 7 + 10 【1D4R】ANSWER SHEET

A
Row		123456789101112131415
Ans.26916161110131119141517161514
B
Row		161718192021222324252627282930
Ans.121521121715221213121515151015
C
Row		313233343536373839404142434445
Ans.131812201222191621171412121716

Worksheet – 15 Abacus Big Friend Addition + 2 = – 8 + 10 【1D3R】

Abacus Big Friend Addition  + 2 = – 8 + 10

123456789101112131415
6
2
2		9
2
3		8
2
4		6
3
2		8
2
1		9
2
-1		9
2
2		9
-1
2		8
2
2		5
3
2		5
1
2		5
3
2		6
3
2		9
2
6		7
2
2
               
161718192021222324252627282930
8
9
2		5
4
2		8
2
7		2
6
2		4
-2
2		1
7
2		3
5
2		6
2
2		5
4
2		4
5
2		1
8
2		4
5
-2		2
7
2		3
6
2		8
2
2
               
313233343536373839404142434445
8
2
1		5
4
3		9
2
-1		6
3
2		9
2
3		8
2
7		1
7
2		6
2
2		9
2
3		2
7
3		8
2
8		7
1
2		6
3
2		1
7
2		5
3
2
               

Worksheet – 15 Abacus Big Friend Addition + 2 = – 8 + 10 【1D3R】ANSWER SHEET

A
Row		123456789101112131415
Ans.10141411111013101210810111711
B
Row		161718192021222324252627282930
Ans.1911171041010101111117111112
C
Row		313233343536373839404142434445
Ans.111210111417101014121810111010

Worksheet – 16 Abacus Big Friend Addition + 2 = – 8 + 10 【1D4R】

Abacus big friend Addition   + 2 = – 8 + 10

123456789101112131415
4
6
7
2		5
4
2
6		8
-2
5
7		7
2
-3
9		3
6
2
5		7
-2
4
-7		2
8
9
-6		6
3
-4
2		8
1
2
-1		7
2
-3
9		6
2
2
1		3
2
3
2		9
2
4
-1		2
3
3
2		4
4
2
1
               
161718192021222324252627282930
8
2
4
1		1
8
2
4		5
4
2
4		7
2
2
4		6
-1
4
2		8
2
4
2		2
3
4
2		5
4
2
8		1
4
3
2		3
2
4
2		9
2
4
-2		4
4
2
2		7
2
2
1		1
3
4
2		7
2
2
3
               
313233343536373839404142434445
4
4
2
6		9
2
4
-3		2
5
1
2		5
4
2
6		8
2
4
3		3
5
2
1		6
2
2
5		5
3
2
7		4
4
2
3		7
2
2
7		1
6
1
2		3
5
2
6		9
2
4
-4		2
6
2
1		6
2
2
8
               

Worksheet – 16 Abacus Big Friend Addition + 2 = – 8 + 10 【1D4R】ANSWER SHEET

A
Row		123456789101112131415
Ans.1917181816213710151110141011
B
Row		161718192021222324252627282930
Ans.151515151116111910111312121014
C
Row		313233343536373839404142434445
Ans.161210171711151713181016111118

Worksheet – 17 Abacus Big Friend Addition + 1 = – 9 + 10 【1D3R】

Abacus Big Friend Addition   +1 = – 9 + 10

123456789101112131415
9
1
3		9
1
5		9
1
8		5
4
1		9
1
1		2
7
1		3
6
1		4
5
1		9
1
7		1
9
4		9
1
4		8
1
-8		8
7
1		3
5
-1		6
3
1
               
161718192021222324252627282930
1
9
1		2
8
-1		3
5
-1		7
2
1		2
1
5		7
3
1		6
3
1		9
1
3		3
6
1		1
8
1		9
1
2		9
1
1		2
7
-1		4
5
1		9
1
9
               
313233343536373839404142434445
5
4
1		7
2
1		1
9
4		9
1
7		3
6
1		9
1
6		2
7
-5		9
1
5		5
4
-1		5
4
1		6
3
1		2
7
1		1
8
1		9
-4
1		8
-1
-2
               

Worksheet – 17 Abacus Big Friend Addition + 1 = – 9 + 10 【1D3R】ANSWER SHEET

A
Row		123456789101112131415
Ans.1315181011101010171414114710
B
Row		161718192021222324252627282930
Ans.11971081110131010121181019
C
Row		313233343536373839404142434445
Ans.10101417101641581010101065

Worksheet – 18 Abacus Big Friend Addition + 1 = – 9 + 10 【1D4R】

Abacus Big Friend addition   +1 = – 9 + 10

123456789101112131415
6
3
1
5		1
5
3
1		7
2
1
4		5
3
1
1		7
5
7
1		8
1
1
6		3
7
9
1		5
4
1
1		6
3
-1
-2		4
6
9
1		9
1
4
1		6
-2
5
1		1
8
1
3		3
2
4
1		8
1
1
1
               
161718192021222324252627282930
5
-1
5
1		2
7
1
2		7
2
1
9		7
2
1
1		5
-2
6
1		3
3
3
1		9
1
4
2		2
-1
8
1		6
3
1
4		1
5
3
1		4
2
3
1		8
1
1
2		4
3
2
1		8
-4
5
1		2
7
1
9
               
313233343536373839404142434445
1
4
4
1		6
-3
6
1		2
3
4
1		5
4
1
1		9
1
4
3		6
-4
7
1		3
5
1
1		8
-7
8
1		4
4
1
1		2
7
1
7		3
4
2
1		7
-4
6
1		4
4
1
1		2
7
1
7		5
-3
7
1
               

Worksheet – 18 Abacus Big Friend Addition + 1 = – 9 + 10 【1D4R】ANSWER SHEET

A
Row		123456789101112131415
Ans.15101410201620116201510131011
B
Row		161718192021222324252627282930
Ans.101219111010161014101012101019
C
Row		313233343536373839404142434445
Ans.101010111710101010171010101710

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F & Q

Q.1. What is big friend addition ?

Q.2. Is Abacus big friend worksheets available here?

Q.3. What is an example of an abacus big friend addition?

Q.4. What is the big friend addition rule in math?

Conclusion

Abacus Level 1 Big friend Addition : Let’s Learn How to Do the 9 Techniques of Big Friend Addition opens the door to a world of mathematical excellence.
By mastering these techniques, you not only enhance your math skills but also boost your cognitive abilities.
Whether you’re a student aiming for mathematical proficiency or an adult seeking mental stimulation, Abacus Level 1 offers a rewarding journey of learning and self-improvement.
Start your adventure today and discover the magic of the abacus.

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