分析:根據(jù)整數(shù)、小數(shù)、分?jǐn)?shù)四則混合運算的運算順序,按照它們的計算法則,能簡算要簡算,直接進行口算.
解答:
解:(1)40×=25; |
(2)-=; |
(3)×=; |
(4)÷10=; |
(5)-1÷6=; |
(6)4.8÷12%=40; |
(7)39+26=65; |
(8)0.32=0.09; |
(9)3-2.7=0.3; |
(10)52=25; |
(11)0.54÷0.9=0.6; |
(12)1-4%=0.96; |
(13)280÷35=8; |
(14)5.4÷0.27=20; |
(15)×= |
(16)30×10%-0.3=2.7; |
(17)12×4÷12×4=16; |
(18)2+0.6=3; |
(19)383-98=285; |
(20)26.26÷26=1.01; |
(21)4.57+6.43=11; |
(22)3.14×32=28.26; |
(23)7.9×11-7.9=79; |
(24)0.1×30%=0.03; |
(25)2÷1%-2=198; |
(26)3.6÷0.036=100; |
(27)7÷19=; |
(28)3.7×0.1%=0.0037; |
(29)0.99×9+0.99=9.9; |
(30)100×0.1%=0.1. |
點評:此題考查的目的是熟練掌握整數(shù)、小數(shù)、分?jǐn)?shù)四則混合運算的運算順序和它們的計算法則,提高口算能力,提高做題的正確率.