问题标题:
脱式计算.能简便的要简便运算.2.87×〔6.3-2.3〕54.7-45.3÷152.008×1999+2.00810.8÷〖〔5.28-1.68〕×0.3〗0.53.69÷〔1.23×0.5〕
问题描述:
脱式计算.能简便的要简便运算.
2.87×〔6.3-2.3〕
54.7-45.3÷15
2.008×1999+2.008
10.8÷〖〔5.28-1.68〕×0.3〗0.5
3.69÷〔1.23×0.5〕
陈祥光回答:
2.87×〔6.3-2.3〕=2.87×4.0=11.4854.7-45.3÷15=54.7-3.02=51.682.008×1999+2.008=4013.992+2.008=401610.8÷〖〔5.28-1.68〕×0.3〗0.5=10.8÷(3.6×0.3)×0.5=10.8÷1.08×0.5=10×0.5=53.69÷〔1.23×0....
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