
5.86×(15.7-8.6)-1.47+简便计算?
1个回答
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5.86×(15.7-8.6)-1.47
=5.86×7.1-1.47
=5.86×(7+0.1)-1.47
=5.86×7+5.86×0.1-1.47
=41.02+0.586-1.47
=41.606-1.47
=40.136
=5.86×7.1-1.47
=5.86×(7+0.1)-1.47
=5.86×7+5.86×0.1-1.47
=41.02+0.586-1.47
=41.606-1.47
=40.136
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