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Tounsyaa
@Tounsyaa
May 2019
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Factoriser les expressions suivantes pour pouvoir effectuer les calculs mentalement :
a) 127 × 57 + 127 × 43
b) 14 × 3,5 + 6,5 × 14
c) 13 × 2,6 - 13 × 0,6
d) 29 × 201 - 29
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ficanas06
Verified answer
a) 127 × 57 + 127 × 43 = 127 * (57+43) = 127 * 100 = 12 700
b) 14 × 3,5 + 6,5 × 14 = 14 * (3.5 + 6.5) = ...
c) 13 × 2,6 - 13 × 0,6 =...
d) 29 × 201 - 29 = 29 * (201-1) = ...
2 votes
Thanks 5
Tounsyaa
Merci beaucoup :)
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Verified answer
a) 127 × 57 + 127 × 43 = 127 * (57+43) = 127 * 100 = 12 700b) 14 × 3,5 + 6,5 × 14 = 14 * (3.5 + 6.5) = ...
c) 13 × 2,6 - 13 × 0,6 =...
d) 29 × 201 - 29 = 29 * (201-1) = ...