Abacus Maths
Towards Better & Brighter India

# 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'