Scoateti factorul comun in afara parantezelor , apoi calculati
a)8×5+5×2;
10×7-7×3
b)2×6+2×5+2×9;
5×10+5×3+7×5;
2×8+8×3+5×8.


Răspuns :

Răspuns:

a) 5(8+2)=5×10=50

7(10-3)=7×7=49

b) 2(6+5+9)=2×20=40

5(10+3+7)=5×20=100

8(2+3+5)=8×10=80

Răspuns:

5(8+2) =50

7(10-3) =49

2(6+5+9) =40

5(10+3+7) =100

8(2+3+5) =80