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15问答网 > 脱式计算，能简算的要简算．①99×0.625+0.625 ②（53.76-17.49）÷1.8 &...

脱式计算，能简算的要简算．①99×0.625+0.625 ②（53.76-17.49）÷1.8 &...

2025-03-15 21:10:11

推荐回答（1个）

回答1：

（1）99×0.625+0.625，
=（99+1）×0.625，
=100×0.625，
=62.5；

（2）（53.76-17.49）÷1.8，
=36.27÷1.8，
=20.15；

（3）（0.8×7+4.56÷1.9）×12.5，
=（5.6+2.4）×12.5，
=8×12.5，
=100；

（4）15.73-（2.17+0.73）-1.83，
=15.73-2.17-0.73-1.83，
=（15.73-0.73）-（2.17+1.83），
=15-4，
=11．

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