1.2x4.3+9.8x5.7如何简算?

mmrtg2022-10-04 11:39:541条回答

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szbaggy 共回答了20个问题 | 采纳率90%
1.2x4.3+9.8x5.7=1.2x4.3+(1.2+8.6)x5.7=1.2x4.3+1.2x5.7+8.6x5.7=1.2x(4.3+5.7)+8.6x5.7=12+49.02=61.02
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