Abacus Combination Formula Subtraction is the last part of level 1 of our abacus.
Till now we have covered 5 chapters of Abacus like small friend addition, small friend subtraction, big friend addition, big friend subtraction, combination addition. Today is our Abacus combination subtraction formula/trick. This formula is also a little difficult and it is difficult to learn it. For this you will have to practice a lot, only then you will be able to master Abacus.
I have made many abacus worksheets for you, if you practice all these worksheets then you will not face any problem in learning abacus, so let’s move towards our Abacus Combination Formula Subtraction and start saving the worksheets.
Table of Contents
Abacus Combination Formula Subtraction Chart
| Formula no. 1 | -6=-10-1+5 -6=-11+5 |
| Formula no. 2 | -7=-10-2+5 -7=-12+5 |
| Formula no. 3 | -8=-10-3+5 -8=-13+5 |
| Formula no. 4 | -9= -10-4+5 -9=-14+5 |
Now We Start Abacus Combination Formula Subtraction Worksheets
Worksheet – 1{1D3R} : Abacus Combination Formula Subtraction -6=-10-1+5
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| 5 7 -6 | 6 7 -6 | 8 5 -6 | 5 8 -6 | 7 6 -6 | 7 5 -6 | 9 5 -6 | 5 9 -6 | 7 4 -6 | 4 7 -6 | 8 6 -6 | 6 8 -6 | 8 3 -6 | 3 8 -6 | 2 9 -6 |
| 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |
| 11 -6 3 | 12 -6 8 | 14 -6 -2 | 44 -6 2 | 31 -6 4 | 13 -6 -1 | 24 -6 -2 | 26 -5 -6 | 10 2 -6 | 24 -6 -5 | 13 -6 -2 | 23 -6 -5 | 14 -6 -5 | 18 -5 -6 | 17 -5 -6 |
| 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 |
| 10 -6 6 | 11 -6 4 | 11 -6 5 | 5 6 -6 | 6 5 -6 | 4 7 -6 | 6 6 -6 | 4 8 -6 | 3 3 -6 | 7 2 -6 | 6 7 -6 | 8 5 -6 | 7 7 -6 | 11 -6 7 | 6 8 -6 |
Worksheet – 1{1D3R} : Abacus Combination Formula Subtraction -6=-10-1+5
ANSWER SHEET
| A Row | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| Ans. | 6 | 7 | 7 | 7 | 7 | 6 | 8 | 8 | 3 | 5 | 8 | 8 | 5 | 5 | 5 |
| B Row | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |
| Ans. | 8 | 14 | 6 | 36 | 29 | 6 | 16 | 15 | 6 | 13 | 5 | 12 | 3 | 7 | 6 |
| C Row | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 |
| Ans. | 10 | 9 | 10 | 5 | 5 | 5 | 0 | 6 | 0 | 3 | 7 | 3 | 8 | 12 | 8 |
Worksheet – 2{1D4R} : Abacus Combination Formula Subtraction -6=-10-1+5
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| 9 5 -6 2 | 4 9 -6 -3 | 8 9 5 -6 | 1 9 1 -6 | 7 9 5 -6 | 3 9 -6 7 | 6 9 -1 -6 | 2 9 -6 -1 | 5 -1 9 -6 | 6 8 -6 -4 | 3 8 -6 -1 | 9 2 -6 -2 | 2 8 1 -6 | 5 9 -6 2 | 8 8 -3 -6 |
| 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |
| 1 7 4 -6 | 4 8 -6 7 | 7 8 -4 -5 | 4 7 -6 7 | 7 7 -6 3 | 3 7 1 -6 | 6 7 -6 -3 | 9 4 -6 9 | 5 8 9 -6 | 2 7 4 -6 | 8 2 1 -6 | 1 6 4 -6 | 6 5 -6 -1 | 1 4 7 -6 | 4 6 1 -6 |
| 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 |
| 8 7 -3 -6 | 2 6 4 -6 | 7 5 -6 -2 | 3 6 5 -6 | 5 7 -6 -2 | 9 7 -3 -6 | 5 9 -6 2 | 4 7 -6 7 | 6 8 -6 8 | 5 9 -5 5 | 4 1 3 3 | 7 4 -6 8 | 7 3 4 -6 | 4 8 -6 8 | 14 -6 4 5 |
Worksheet – 2{1D4R} : Abacus Combination Formula Subtraction -6=-10-1+5
ANSWER SHEET
| A Row | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| Ans. | 10 | 4 | 16 | 5 | 15 | 13 | 8 | 4 | 7 | 4 | 4 | 3 | 5 | 10 | 7 |
| B Row | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |
| Ans. | 6 | 13 | 6 | 12 | 9 | 5 | 4 | 16 | 16 | 7 | 5 | 5 | 4 | 6 | 5 |
| C Row | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 |
| Ans. | 6 | 6 | 4 | 8 | 4 | 7 | 10 | 12 | 16 | 14 | 11 | 13 | 8 | 2 | 17 |
Worksheet – 3{1D3R} : Abacus Combination Formula Subtraction -7=-10-2+5
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| 10 -7 7 | 12 -7 -5 | 6 5 -7 | 7 7 -7 | 6 6 -7 | 6 8 -7 | 9 5 -7 | 4 7 -7 | 4 8 -7 | 3 9 -7 | 12 -7 5 | 7 6 -7 | 13 -7 4 | 8 4 -7 | 5 8 -7 |
| 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |
| 5 7 -7 | 6 7 -7 | 8 5 -7 | 5 8 -7 | 3 9 -7 | 4 8 -7 | 8 6 -7 | 7 5 -7 | 7 6 -7 | 9 3 -7 | 6 8 -7 | 4 9 -7 | 7 7 -7 | 5 9 -7 | 9 5 -7 |
| 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 |
| 12 -7 2 | 22 -7 2 | 20 2 -7 | 16 -7 3 | 14 -7 3 | 35 -1 -7 | 10 3 -7 | 11 2 -7 | 20 4 -7 | 14 -7 2 | 21 2 -7 | 24 -7 -5 | 17 -5 -7 | 23 1 -7 | 19 -5 -7 |
Worksheet – 3{1D3R} : Abacus Combination Formula Subtraction -7=-10-2+5 ANSWER SHEET
| A Row | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| Ans. | 10 | 0 | 4 | 7 | 5 | 7 | 7 | 4 | 5 | 4 | 4 | 3 | 5 | 10 | 7 |
| B Row | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |
| Ans. | 6 | 13 | 6 | 12 | 11 | 5 | 4 | 16 | 16 | 7 | 5 | 5 | 4 | 6 | 5 |
| C Row | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 |
| Ans. | 6 | 6 | 4 | 8 | 4 | 7 | 10 | 12 | 16 | 14 | 11 | 13 | 10 | 14 | 17 |
Worksheet – 4{1D4R} : Abacus Combination Formula Subtraction -7=-10-2+5
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| 4 4 5 -7 | 9 5 -7 -3 | 1 4 8 -7 | 3 2 8 -7 | 8 9 5 -7 | 6 6 -7 -1 | 2 3 8 -7 | 7 9 -2 -7 | 5 9 -7 4 | 7 8 -3 -7 | 2 4 8 -7 | 5 8 -7 6 | 9 6 -1 -7 | 1 9 4 -7 | 4 3 6 -7 |
| 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |
| 8 8 -2 -7 | 3 9 -7 6 | 6 5 1 -7 | 6 4 4 -7 | 1 6 6 -7 | 8 7 -1 -7 | 5 7 2 -7 | 3 9 -7 8 | 9 7 -2 -7 | 2 9 1 -7 | 4 9 -7 6 | 7 7 -7 -3 | 5 5 4 -7 | 7 6 -7 -2 | 1 5 6 -7 |
| 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 |
| 3 8 3 -7 | 8 6 -7 9 | 6 3 5 -7 | 2 2 8 -7 | 9 8 -4 -7 | 4 8 -7 6 | 10 -7 7 7 | 5 7 -7 -5 | 4 6 -7 -1 | 5 6 -7 -1 | 3 7 -7 -2 | 6 -3 9 7 | 8 6 -7 8 | 5 9 -7 5 | 9 5 -7 4 |
Worksheet – 3{1D3R} : Abacus Combination Formula Subtraction -7=-10-2+5 ANSWER SHEET
| A Row | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| Ans. | 6 | 4 | 14 | 6 | 15 | 4 | 6 | 7 | 11 | 5 | 7 | 12 | 7 | 7 | 6 |
| B Row | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |
| Ans. | 7 | 11 | 5 | 7 | 6 | 7 | 7 | 13 | 7 | 5 | 12 | 4 | 7 | 4 | 5 |
| C Row | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 |
| Ans. | 7 | 16 | 7 | 5 | 3 | 11 | 17 | 0 | 2 | 3 | 1 | 19 | 15 | 12 | 11 |
Worksheet – 5{1D3R} : Abacus Combination Formula Subtraction -8=-10-3+5
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| 5 9 -8 | 6 7 -8 | 7 7 -8 | 8 6 -8 | 8 5 -8 | 6 8 -8 | 9 5 -8 | 6 3 -8 | 5 8 -8 | 7 6 -8 | 5 5 -8 | 6 4 -8 | 7 8 -8 | 9 -8 9 | 5 9 5 |
| 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |
| 17 -8 7 | 24 -8 7 | 13 -8 9 | 23 -8 7 | 24 -8 -5 | 14 -8 -1 | 23 -8 -5 | 14 -8 2 | 24 -8 -1 | 23 -8 -2 | 14 -8 3 | 24 -8 -6 | 23 -8 2 | 24 -8 2 | 10 -8 8 |
| 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 |
| 13 -8 3 | 7 7 -8 | 8 5 -8 | 4 9 -8 | 6 8 -8 | 14 -8 -5 | 9 5 -8 | 5 4 -8 | 6 4 -8 | 6 7 -8 | 5 8 -8 | 5 9 -8 | 9 4 -8 | 3 7 -8 | 30 3 -8 |
Worksheet – 5{1D3R} : Abacus Combination Formula Subtraction -8=-10-3+5 ANSWER SHEET
| A Row | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| Ans. | 6 | 5 | 6 | 6 | 5 | 6 | 6 | 1 | 5 | 5 | 2 | 2 | 7 | 10 | 19 |
| B Row | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |
| Ans. | 16 | 23 | 14 | 22 | 11 | 5 | 10 | 8 | 15 | 13 | 9 | 10 | 17 | 18 | 10 |
| C Row | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 |
| Ans. | 8 | 6 | 5 | 5 | 6 | 1 | 6 | 1 | 2 | 5 | 5 | 6 | 5 | 2 | 25 |
Worksheet – 6{1D4R} : Abacus Combination Formula Subtraction -8=-10-3+5
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| 9 9 -5 -8 | 1 9 4 -8 | 4 4 5 -8 | 8 5 -8 6 | 5 -1 9 -8 | 3 2 9 -8 | 7 9 -2 -8 | 2 3 9 -8 | 6 7 -8 -1 | 6 9 -1 -8 | 1 8 5 -8 | 9 -5 9 -8 | 2 4 7 -8 | 4 9 -8 -1 | 8 9 -3 -8 |
| 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |
| 5 9 -8 -2 | 3 3 7 -8 | 7 8 -2 -8 | 1 7 5 -8 | 7 6 -8 -1 | 5 8 -8 -1 | 3 4 6 -8 | 4 8 1 -8 | 6 8 9 -8 | 8 8 -2 -8 | 2 9 2 -8 | 5 6 3 -8 | 3 5 5 -8 | 8 7 -2 -8 | 1 6 6 -8 |
| 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 |
| 6 6 1 -8 | 4 9 -8 -2 | 9 6 -1 -8 | 2 4 8 -8 | 7 -3 9 -8 | 13 -8 3 3 | 8 5 -8 -1 | 6 7 -8 3 | 9 5 -8 5 | 8 8 8 -8 | 16 8 -8 -8 | 6 8 -8 6 | 4 8 -8 7 | 9 3 -8 9 | 9 -2 7 -7 |
Worksheet – 6{1D4R} : Abacus Combination Formula Subtraction -8=-10-3+5 ANSWER SHEET
| A Row | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| Ans. | 5 | 6 | 6 | 11 | 5 | 6 | 6 | 6 | 4 | 6 | 6 | 5 | 5 | 4 | 6 |
| B Row | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |
| Ans. | 5 | 5 | 5 | 5 | 4 | 4 | 5 | 5 | 15 | 6 | 5 | 6 | 5 | 5 | 3 |
| C Row | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 |
| Ans. | 5 | 4 | 6 | 6 | 5 | 11 | 4 | 8 | 11 | 16 | 8 | 12 | 11 | 13 | 7 |
Worksheet – 7{1D3R} : Abacus Combination Formula Subtraction -9= -10-4+5
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| 7 7 -9 | 5 9 -9 | 8 6 -9 | 4 5 -9 | 10 -9 9 | 7 8 -9 | 6 8 -9 | 9 5 -9 | 3 6 9 | 18 -9 -9 | 15 -1 -9 | 10 4 -9 | 9 7 9 | 5 9 9 | 14 -9 -5 |
| 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |
| 3 8 -9 -2 | 2 4 -9 4 | 1 4 -9 4 | 4 4 -9 2 | 1 4 -9 5 | 3 4 -9 4 | 2 4 -9 3 | 3 4 -9 3 | 2 4 -9 4 | 4 4 -9 1 | 2 4 -9 5 | 1 4 -9 5 | 3 4 -9 9 | 2 4 -9 3 | 3 4 -9 7 |
| 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 |
| 11 -9 9 | 8 6 -9 | 14 -9 3 | 9 5 -9 | 6 8 -9 | 7 7 -9 | 24 -9 -5 | 9 5 9 | 6 3 -9 | 5 9 -9 | 18 -4 -9 | 19 -5 -9 | 20 4 -9 | 9 9 -9 | 10 4 -9 |
Worksheet – 7{1D3R} : Abacus Combination Formula Subtraction -9= -10-4+5 ANSWER SHEET
| A Row | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| Ans. | 5 | 5 | 5 | 0 | 10 | 10 | 5 | 5 | 18 | 0 | 5 | 5 | 25 | 23 | 0 |
| B Row | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |
| Ans. | 0 | 1 | 1 | 1 | 1 | 2 | 0 | 1 | 1 | 0 | 2 | 1 | 7 | 0 | 5 |
| C Row | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 |
| Ans. | 11 | 5 | 8 | 5 | 5 | 5 | 10 | 23 | 0 | 5 | 5 | 5 | 15 | 9 | 5 |
Worksheet – 8{1D4R} : Combination Subtraction Formula -9= -10-4+5
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| 1 9 4 -9 | 9 5 -9 -1 | 6 4 4 -9 | 3 9 2 -9 | 8 6 -9 -1 | 2 9 3 -9 | 4 1 9 -9 | 7 7 -9 -2 | 5 5 4 -9 | 6 5 3 -9 | 1 8 5 -9 | 4 2 8 -9 | 9 7 8 -9 | 3 2 9 -9 | 7 3 4 -9 |
| 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |
| 5 9 -9 -1 | 2 8 4 -9 | 8 7 -1 -9 | 1 7 6 -9 | 8 6 -9 -2 | 5 8 1 -9 | 2 7 5 -9 | 7 7 -9 -4 | 3 8 3 -9 | 9 6 -1 -9 | 4 3 7 -9 | 6 6 2 -9 | 7 9 8 -9 | 1 6 7 -9 | 3 7 4 -9 |
| 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 |
| 5 9 -9 -2 | 8 8 8 -9 | 4 4 6 -9 | 6 7 1 -9 | 2 6 6 -9 | 9 5 -9 -4 | 15 -9 4 -9 | 7 7 -9 4 | 9 5 -9 6 | 18 9 -9 -9 | 6 8 -9 -3 | 7 8 8 -9 | 6 8 7 -9 | 8 3 3 -9 | 6 6 2 -9 |
Worksheet – 8{1D4R} : Combination Subtraction Formula -9= -10-4+5 ANSWER SHEET
| A Row | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| Ans. | 4 | 5 | 7 | 5 | 4 | 5 | 5 | 3 | 5 | 5 | 5 | 5 | 15 | 5 | 5 |
| B Row | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |
| Ans. | 4 | 5 | 5 | 5 | 3 | 5 | 5 | 1 | 5 | 5 | 5 | 5 | 15 | 5 | 5 |
| C Row | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 |
| Ans. | 3 | 15 | 7 | 5 | 5 | 1 | 1 | 9 | 11 | 9 | 2 | 16 | 12 | 5 | 5 |
Abacus Books Level 1
Abacus Level 1 Books {book A & book B}
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F & Q
How do you solve abacus subtraction?
Can abacus perform subtraction?
How to do mix friends in abacus?
What is abacus for class 5?
How do you count in abacus?
What is subtraction formula in abacus?
How to do easy subtraction ?
Conclusion
formula of Abacus Course Level 1 and now we have complete knowledge of the entire Abacus Level 1.
In this part of ours, you have studied 6 chapters of Level 1 and I hope that you have also practiced all the worksheets given in this part.
If you haven’t done it then do it because now in the next part we are going to start level 2. And if you have not practiced Level 1 properly then you will not understand Level 2.
Then if you face any problem in Level 1 or do not understand anything, then please comment and I will reply to you.
Thank you very much for reading this blog of mine🙏