| 直接写出得数. 236+298= | = | = | 0.15+20.2= |
10÷ = | 6.3÷0.07= | 0.25÷2.5%= | 6-0.75= |
51× = | 3.7×0.001= | = | = |
| 解:236+298=534; | = ; | =4.5; | 0.15+20.2=20.35; |
10÷ =12; | 6.3÷0.07=90; | 0.25÷2.5%=10; | 6-0.75=5.25; |
51× =34; | 3.7×0.001=0.0037; | =2 ; | =1 . |
,4.5,20.35,12,90,10,5.25,34,0.0037,
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.分析:(1)依据整数加法性质化为236+300-2解答,
(2)(3)(5)(7)(9)(11)(12)依据分数四则运算计算方法解答,
(4)(6)(8)(10)依据小数四则运算计算方法解答.
点评:本题主要考查学生运用四则运算方法解决问题的能力.
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