问题标题:
脱式计算,能简算的要简算.①67.5×0.52+3.25×5.2②36×(56+79)③42÷(65÷37)④3.5×[(702-270)÷16].
问题描述:
脱式计算,能简算的要简算.
①67.5×0.52+3.25×5.2 | ②36×( |
6 |
曹燕回答:
①67.5×0.52+3.25×5.2,
=6.75×5.2+3.25×5.2,
=(6.75+3.25)×5.2,
=10×5.2,
=52;
②36×(56
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