0.279+343+0.657×0.279的简便计算?
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0.279+343+0.657×0.279
=0.657×0.279+0.279+343
=0.279x1.657+343
=(0.3-0.021)x1.657+343
=0.462303+343
=343.462303
=0.657×0.279+0.279+343
=0.279x1.657+343
=(0.3-0.021)x1.657+343
=0.462303+343
=343.462303
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