Tính:
a) \(4802 × 324 ;\)
\(6120 × 205 ;\)
b) \(\dfrac{4}{17} × 2 ;\)
\(\dfrac{4}{7} × \dfrac{5}{12}\) ;
c) \(35,4 × 6,8 ;\)
\(21,76 × 2,05 .\)
b) \(\dfrac{4}{17}\times 2 = \dfrac{8}{17}\);
\(\dfrac{4}{7} \times \dfrac{5}{12} = \dfrac{20}{84}\) ;
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