Question

2. Calculaţi în două moduri:
( 10 - 4) x 7=
( 4 + 5) x 6=
8x ( 3+6)=
10x (8-3)=​

Answer 1

Răspuns:

(10-4)×7=6×7=42

(10-4)×7=(10×7)-(4×7)=70-28=42

(4+5)×6=9×6=54

(4+5)×6=(4×6)+(5×6)=24+30=54

8×(3+6)=8×9=72

8×(3+6)=(8×3)+(8×6)=24+48=72

10×(8-3)=10×5=50

10×(8-3)=(10×8)-(10×3)=80-30=50