Question

Найди произведение удобным способом и №6 №7

Answer 1

5×(2×7)=5×2×7=10×7=70

(6×8)×5 = 6×8×5=6×5×8=30×8=240

3×(4×5)=3×20=60

100×(3×7)=100×21=2100

(20×5)×6=100×6=600

(60×5)×4=60×(5×4)=60×20=1200

(30×6)×10=30×6×10=180×10=1800

20×(50×7)=20×50×7=1000×7=7000