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Calculer astucieusement. a) 7,25*102; b)16,8*12-2*16,8; c)(1,5+5)*26 d)7,5*16,3+7,9*83,7

Sagot :

a) 7,25 x 100+ 7,25x2= 739,5
b)16,8x10+16,8x2-2x16=169,6
c)26x5+26x1,5
d)