a)4/5+1/2-5/8 b)2/1+3/8-7/6
c)1/2×1/7 d)3/4×1/5
e)3/4÷2/5
f)
3
-
5
-
8
-
7
( com calculo)
c)1/2×1/7 d)3/4×1/5
e)3/4÷2/5
f)
3
-
5
-
8
-
7
( com calculo)
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Resposta:
a)4/5+1/2-5/8
(32+20-40)/40=12/40=3/10
Explicação passo-a-passo:
b)2/1+3/8-7/6
(2+3/8-7/6)=(24+9-28)/12=5/12
c)1/2×1/7=1/14
d)3/4×1/5=3/20
e)3/4÷2/5=15/8