Question

Tính: 

a) 12 – 2 – 1                        b) 12 – 2 – 4

c) 12 – 2 – 6                        d) 12 – 2 – 7

Answer 1

a) 12 – 2 – 1 = 10 – 1 = 9.

b) 12 – 2 – 4  = 10 – 4 = 6.

c) 12 – 2 – 6 = 10 – 6 = 4.

d) 12 – 2 – 7 = 10 – 7 = 3.