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hirondelle52

Bonjour;

a) -20 - (-2 + 3) =

= -20 +2 -3

= -23 +2

= -21

b) 100 - (25 - 10+5)

= 100-25 +10 -5

= 110-30

= 80

jpmorin3

bonjour

a) -20 - (-2 + 3) = -20 - (+1) =  -20 - 1 = -21

b) 100 - (25 - 10+5) = 100 - (15 + 5) = 100 - 20 = 80

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