Abacus Subtraction Formulas
Abacus Subtraction Formulas: Big Friend Less Order
Numbers
|
Formulas |
Big Friends |
(- 1) Less One
|
- 1 = - 10 + 9 |
Big Friend of '1' is '9'
|
| (- 2) Less Two |
- 2 = - 10 + 8 |
Big Friend of '2' is '8' |
| (- 3) Less Three |
- 3 = - 10 + 7 |
Big Friend of '3' is '7' |
| (- 4) Less Four |
- 4 = - 10 + 6 |
Big Friend of '4' is '6' |
| (- 5) Less Five |
- 5 = - 10 + 5 |
Big Friend of '5' is '5' |
| (- 6) Less Six |
- 6 = - 10 + 4 |
Big Friend of '6' is '4' |
| (- 7) Less Seven |
- 7 = - 10 + 3 |
Big Friend of '7' is '3' |
| (- 8) Less Eight |
- 8 = - 10 + 2 |
Big Friend of '8' is '2' |
| (- 9) Less Nine |
- 9 = - 10 + 1 |
Big Friend of '9' is '1' |
Abacus Subtraction Formulas: Small Friend Less Order
| Numbers |
Formulas |
Small Friends |
(- 1) Less One
|
- 1 = + 4 - 5
|
Small Friend of '1' is '4'
|
| (- 2) Less Two |
- 2 = + 3 - 5 |
Small Friend of '2' is '3' |
| (- 3) Less Three |
- 3 = + 2 - 5 |
Small Friend of '3' is '2' |
| (- 4) Less Four |
- 4 = + 1 - 5 |
Small Friend of '4' is '1' |
Abacus Subtraction Formulas: Combination Less Order
| Numbers |
Formulas
|
Combination Friends |
(- 6) Less Six
|
- 6 = - 10 + 5 - 1 |
Comb. Friend of '6 is '1'
|
| (- 7) Less Seven |
- 7 = - 10 + 5 - 2
|
Comb. Friend of '7' is '2' |
| (- 8) Less Eight |
- 8 = - 10 + 5 - 3 |
Comb. Friend of '8' is '3' |
| (- 9) Less Nine |
- 9 = - 10 + 5 - 4 |
Comb. Friend of '9' is '4' |
