Question

Tính nhầm.

a) 7 x 50 x 20

b) 40 x 3 x 50

c) 80 x 1 000 x 4

d) 3 x 60 x 500

Answer 1

a) 7 x 50 x 20 = 7 x (50 x 20) = 7 x 1 000 = 7 000

b) 40 x 3 x 50 = (40 x 50) x 3= 2 000 x 3 = 6 000

c) 80 x 1 000 x 4 = 80 000 x 4 = 320 000

d) 3 x 60 x 500 = 3 x (60 x 500) = 3 x 30 000 = 90 000