Question

Tính nhẩm

a) 50000 + 40000 = .......................

    90000 - 20000 = .......................

b) 42000 + 6000 = .......................

    86000 - 2000 = .......................

c) 40000 x 2 = .......................

    80000 : 4 = .......................

d) 12000 x 3 = 3.......................

    72000 : 8 = .......................

Answer 1

a) 50000 + 40000 = 90 000

    90000 - 20000 = 70000

b) 42000 + 6000 = 48000

    86000 - 2000 = 84000

c) 40000 x 2 = 80000

    80000 : 4 = 20000

d) 12000 x 3 = 36000

    72000 : 8 = 9000

Answer 2

90000

70000

48000

84000

80000

16000

9000