Question

giúp mình giải toán lớp 2 : Tính nhanh

a) 12+24+35-2-14-25

b) 1-2+3-4+5-6+7-8+9

c) 25-12-3+24+36

Answer 1

a) = 30

b) = 5

c) = 70

Answer 2

a)12+24+35-2-14-25=30

b)1-2+3-4+5-6+7-8+9=5

c)25-12-3+24+36=70

Answer 3

a) = 30

b) = 5

c) = 70

Answer 4

a)12+24+35-2-14-25=30

b)1-2+3-4+5-6+7-8+9=5

c)25-12-3+24+36=70

Answer 5

a) 12 + 24 + 35 - 2 - 14 - 25 = 30

b) 1 - 2 + 3 - 4 + 5 - 6 + 7 - 8 + 9 = 5

c) 25- 12 - 3 + 14 + 36 = 70

Answer 6

12+24+35-2-14-25

    36   +35- 2-14-25

          71   -    16 - 25

          71   -        41

                   30