Question

Resolva as operações e simplifique se possível.
A)8/21 + 5/21 - 7/21=
B)11/12 - 8/12 + 2/12=
C)3/11 × 4/6
D)10/12 ÷ 1/7

Answer 1

A-0,2
B-0,4
C-0,1
D-5,8

Answer 2

A)8/21 + 5/21 - 7/21=

13/21 - 7/21 = 6/21

6/21 (6÷3 e 21÷3) = 2/7

B)11/12 - 8/12 + 2/12=

3/12 + 2/12 = 5/12

C)3/11 × 4/6

12/66 (12÷2 e 66÷2) = 6/33

6/33 (6÷3 e 33÷3) = 2/11

D)10/12 ÷ 1/7

10/12 × 7/1 = 70/12

70/12 (70÷2 e 12÷2) = 35/6

35/6 (35÷6 e 6÷6) = 5/1