\[\frac{9}{{16}}\] của 3 200 m là:  

\[\frac{4}{9}\,\, + \,......\,\, = \,\,\frac{7}{9}\]

\[\frac{{21}}{{48}}\,\, \times \,\,\frac{{..........}}{{14}}\,\, = \,\,\frac{{21}}{{16}}\]

\[\frac{{92}}{{17}}\,\, - \,\,\frac{{........}}{{17}}\,\, = \,\,5\,\]

\[..........\,\,:\,\,\frac{5}{9}\,\, = \,\,2\]

401 249 789 + 348 980 120

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654 702 457 – 567 980 127

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457 012 × 41

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894 125 : 21

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