Question

Viết phép nhân.

Mẫu:       

10 + 10 + 10 + 10 = 10 × 4

a) 7 + 7 + 7 + 7 + 7

b) 4 + 4 + 4 + 4 + 4 + 4

c) 9 + 9 + 9

d) 10 + 10 + 10 + 10 + 10

Answer 1

a) 7 + 7 + 7 + 7 + 7 = 7 × 5.

b) 4 + 4 + 4 + 4 + 4 + 4 = 4 × 6.

c) 9 + 9 + 9 = 9 × 3.

d) 10 + 10 + 10 + 10 + 10 = 10 × 5.