Tính bằng cách thuận tiện:

35 × 18 – 9 × 70 + 100 = ………………………………… = ………………………………… = …………………………………

349 + 602 + 651 + 398   = ………………………………… = ………………………………… = …………………………………

263 158 + 125 341

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724 540 – 423 814

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180 408 × 57

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419 065 : 31

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3 tạ \(\frac{4}{5}\) yến = ……… kg

3 dm² 50 cm² = ……… cm²22222222

\(\frac{7}{4}\) + \(\frac{7}{6}\) = ……………………………

\(\frac{{100}}{{110}}\) – \(\frac{{56}}{{88}}\) = ……………………………

\(\frac{5}{6}\) × \(\frac{{24}}{{11}}\) = ……………………………

\(\frac{7}{6}\) : \(\frac{4}{3}\) = ………………………………