Bonjour,
a) 2 × 5 = 10 donc 0,02 × 5 = 0,10 = 0,1
b) 8 × 125 = 1 000 donc 0,8 × 125 = 100,0 = 100
c) 4 × 25 = 100 donc 0,4 × 25 = 10,0 = 10
d) 8 × 125 = 1 000 donc 8 × 1,25 = 10,00 = 10
e) 4 × 25 = 100 donc 4 × 0,025 = 0,100 = 0,1
f) 2 × 5 = 10 donc 2 × 0,5 = 1,0 = 1
g) 4 × 25 = 100 donc 40 × 25 = 10 × 4 × 25 = 10 × 100 = 1 000
h) 8 × 125 = 1 000 donc 8 × 12 500 = 8 × 125 × 100 = 1 000 × 100
= 100 000
i) 2 × 5 = 10 donc 200 × 50 = 2 × 5 × 100 × 10 = 10 × 1 000 = 10 000
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Bonjour,
a) 2 × 5 = 10 donc 0,02 × 5 = 0,10 = 0,1
b) 8 × 125 = 1 000 donc 0,8 × 125 = 100,0 = 100
c) 4 × 25 = 100 donc 0,4 × 25 = 10,0 = 10
d) 8 × 125 = 1 000 donc 8 × 1,25 = 10,00 = 10
e) 4 × 25 = 100 donc 4 × 0,025 = 0,100 = 0,1
f) 2 × 5 = 10 donc 2 × 0,5 = 1,0 = 1
g) 4 × 25 = 100 donc 40 × 25 = 10 × 4 × 25 = 10 × 100 = 1 000
h) 8 × 125 = 1 000 donc 8 × 12 500 = 8 × 125 × 100 = 1 000 × 100
= 100 000
i) 2 × 5 = 10 donc 200 × 50 = 2 × 5 × 100 × 10 = 10 × 1 000 = 10 000