Question

Tính nhẩm.

a) 14 – 4 – 3

14 – 7

b) 12 – 2 – 6

12 – 8

c) 16 – 6 – 3

16 – 9

Answer 1

a) 14 – 4 – 3 = 10 – 3 = 7

    14 – 7 = 7

b) 12 – 2 – 6 = 10 – 6 = 4

    12 – 8 = 4

c) 16 – 6 – 3 = 10 – 3 = 7

    16 – 9 = 7