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题目:(1)215+370+85(2)(569+468)+(432+101)+30(3)363×56-263×56(4)360÷4÷9(5)(83-47)×25+72×36+36×103(6)56×49+5

问题描述:

(1)215+370+85 (2)(569+468)+(432+101)+30
(3)363×56-263×56 (4)360÷4÷9
(5)(83-47)×25+72×36+36×103 (6)56×49+56
(7)420÷35

最佳答案:

(1)原式=215+85+370                =300+370                =670 (2)原式=(569+101+30)+(432+468)                =700+900                =1600
(3)原式=(363-263)×56                =100×56                =5600 (4)原式=360÷(4×9)                =360÷36                =10
(5)原式=(25+72+103)×36                =200×36                =7200 (6)原式=56×(49+1)                =56×50                =2800
(7)原式= 420÷7÷5                =60÷5                =12
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