CLARA89200
Answered

Calculer mentalement 48 x 7 en utilisant

a) 48 x 7 = ( 40 + 8 ) x 7

 

b) 48 x 7 = ( 50 - 2 ) x 7

Je n'est rien compris

Sagot :

a) 48 x 7 = (40+8)x7
             = 40x7+8x7
             =280+56=336
b) 48 x 7 = (50-2)x7
             =50x7-2x7
              =350-14=336
DROOPETTE
a) 48 x 7
= ( 40 + 8 ) x 7
=(40x7)+(8x7)
=280+56
=336

 b) 48 x 7
= ( 50 - 2 ) x 7
=(50x7)-(2x7)
=350-14
=336