
7.8×0.24+7.6x0.78用简便方法计算?
1个回答
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7.8×0.24+7.6x0.78
=7.8×0.24+0.76×10×0.78
=7.8×0.24+0.76×7.8
=7.8×(0.24+0.76)
=7.8×1
=7.8
=7.8×0.24+0.76×10×0.78
=7.8×0.24+0.76×7.8
=7.8×(0.24+0.76)
=7.8×1
=7.8
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