Calculer mentalement en changeant l'ordre des 27 4*77* 25 = 5x 56 20 = 2.2500X8X9X4= d. 125 x 25x8x3x 4 =

Réponse:

4×77×25=7700

5×5620=28100

2500×8×9×4=720000

125×25×8×3×4=300000

Explications étape par étape:

4×77×25

=308×25

=7700

5×5620= 28100

2500×8×9×4

=20000×9×4

=180000×4

=720000

125×25×8×3×4

=125×25×8×12

=125×25×96

=125×2400

=300000