Explicação passo-a-passo:
a) 12/5
b) 10/2= 5
c) 15 + 12
______=
6
27÷ 3
_____=
6÷3
9/2
d) 45 + 32
________=
20
77/20
e) 2/2= 1
f) 6/5
g) 48 - 24
12
24
__=
2
h) 119 - 30
21
89/21
2)
a) 8 6
__ × ___
3 2
48/6=
8
b) 8/4 × 8/5=
64/20=
64 ÷ 2
20 ÷ 2
32/10
c) 8/4 ÷ 7/2
8/4 × 2/7=
16/28=
16 ÷ 4
28 ÷ 4
4/7
d) 5/3 ÷ 9/5=
5/3 × 5/9=
25/27
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Explicação passo-a-passo:
a) 12/5
b) 10/2= 5
c) 15 + 12
______=
6
27÷ 3
_____=
6÷3
9/2
d) 45 + 32
________=
20
77/20
e) 2/2= 1
f) 6/5
g) 48 - 24
________=
12
24
__=
12
2
h) 119 - 30
________=
21
89/21
2)
a) 8 6
__ × ___
3 2
48/6=
8
b) 8/4 × 8/5=
64/20=
64 ÷ 2
______=
20 ÷ 2
32/10
c) 8/4 ÷ 7/2
8/4 × 2/7=
16/28=
16 ÷ 4
_____=
28 ÷ 4
4/7
d) 5/3 ÷ 9/5=
5/3 × 5/9=
25/27