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Sagot :

Salut !

a) 10 % de 58 = 58 × 10/100 = 580/100 = 5,8

b) 50 % de 42,8 = 42,8 × 50/100 = 42,8 × 1/2 = 42,8 ÷ 2 = 21,4

c) 100 % de  49 = 49 × 100/100 = 49 × 1 = 49

d) 25 % de 200 = 200 × 25/100 = 200 × 1/4 = 200 ÷ 4 = 50

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