正确、合理、灵活的计算下面各题.①(1.75×0.2+1.75×0.8)÷17.5②1014-(614-215)③243×814+75.7×82.5④38×114+125%+0.625×1.25⑤0.91÷45+1.25×10.9⑥(56+78-512)÷124.-数学
题文
正确、合理、灵活的计算下面各题. ①(1.75×0.2+1.75×0.8)÷17.5 ②10
③243×8
④
⑤0.91÷
⑥(
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答案
(1)(1.75×0.2+1.75×0.8)÷17.5, =1.75×(0.2+0.8)÷17.5, =1.75×1÷17.5, =1.75÷17.5, =0.1; (2)10
=10
=4+2
=6
(3)243×8
=(24.3+75.7)×82.5, =100×82.5, =8250; (4)
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