Question

Îmi trebuie ex :5,6,7,8 dau multe puncte =))))

Answer 1

5. 45=20+25 45=9×5

6. a) 15=3+3+3+3+3
b) 15=5×3

7. 7+5=12 7-5=2
7×5=35

8. a) (2×2)×3=4×3=12

2×(2×3)=2×6=12

b) 5×(2×3)=5×6=30

(5×2)×3=10×3=30