MAVACRE
Answered

Recopie et complète ces égalité:

 

a. 7x(23+6)=7x...+7x...

b.(45-31)x5=x ...5-31x....

 

c.1,2x7+1,2x11=...x(7+...)

d. 3x1,4-3x0,8=(1,4 .... 0,8) ...3

Sagot :

a) 7x(23+6)=7x23+7x6
b)(45-31)x5=45x5-31x5
c) 1,2x7+1,2x11=1,2x(7+11)
d) 3x1,4-3x0,8=(1,4-0,8)x3
DROOPETTE
a. 7x(23+6)
=7x23+7x6
=161+42
=203

b.(45-31)x5
=45x5-31x5
=225-155
=70

c.1,2x7+1,2x11
=1.2x(7+11)
=8.4+13.2
=21.6

d. 3x1,4-3x0,8
=(1,4-0,8)x3
=4.2-2.4
=1.8