EXERCICE 26 Calculer astucieusement : M = 2,5 x 36 x 4 N = 0,04 x 82 x 5000 O = 50 × 40 × 0,5 × 2,5 EXERCICE 27 Calculer le plus rapidement possible: P=93x6+93×

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