Bonjour
Calculer astucieusement :
M = 2,5 x 36 x 4
M = 2,5 x 4 x 36
M = 10 x 36
M = 360
N = 0,04 x 82 x 5000
N = 0,04 x 5000 x 82
N = 4 x 10^(-2) x 5 x 10^3 x 82
N = 5 x 4 x 10^(-2+3) x 82
N = 20 x 10 x 82
N = 200 x 82
N = 16400
O = 50 × 40 × 0,5 × 2,5
O = 50 x 2,5 x 40 x 2,5
O = 50 x 2,5 x 100
O = 125 x 100
O = 12500
EXERCICE 27 Calculer le plus rapidement possible:
P= 93x6+93×4
P = 93(6 + 4)
P = 93 x 10
P = 930
R = 63 x 63,13-63 x 53,13
R = 63(63,13 - 53,13)
R = 63 x 10
R = 630
S = 2,018 x 665-2,018 x 335
S = 2,018(665 - 335)
S = 2,018 x 330
S = 665,94
T = 37458 x 63458-37458 x 63457
T = 37458(63458 - 63457)
T = 37458 x 1
T = 37458
