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## Subtraction Formulas

Abacus Math >> Abacus Formulas >> Subtraction Formulas >>

# Abacus Subtraction Formulas

## Big Friend Less Order Formulas

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'

## Small Friend Less Order Formulas

NumbersFormulas 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'

## Combination Less Order Formulas

NumbersFormulas
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 - 4Comb. Friend of '9' is '4'