Simplifique e efetue os cálculos: ( Frações)
a-69/70 x 52/18- ?
b-81/52 x 26/117- ?
c-9/35x 30/9-?
d-84/165 x 7/12 x 99/189-?
- 7 x 69/70 x 52/18-?
a-69/70 x 52/18- ?
b-81/52 x 26/117- ?
c-9/35x 30/9-?
d-84/165 x 7/12 x 99/189-?
- 7 x 69/70 x 52/18-?
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