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7.2乘0.36加0.72乘6.4怎么巧算,急急急

7.2X0.36+0.72X6.4 =0.72X(3.6+6.4) =0.72X10 =7.2

7.2x2.5+7.2x7.4+0.72巧算 =7.2x2.5+7.2x7.4+7.2x0.1 =7.2x(2.5+7.4+0.1) =7.2x10 =72

原式 =7.2×2.7.2×7.4+7.2×0.1 =7.2×(2.7+7.2+0.1) =7.2×10 =72 希望对你有帮助,满意请及时采纳, 你的采纳是我回答的动力!

=7.2×7.2+7.2×3.8-7.2×1 =7.2×(7.2+3.8-1) =7.2×10 =72

=0.72x172+0.72-0.72x73 =0.72x(172+1-73) =0.72x100 =72

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