分析:(1)根據(jù)乘法交換律簡(jiǎn)便計(jì)算;
(2)根據(jù)整數(shù)的減法法則計(jì)算即可;
(3)根據(jù)小數(shù)的乘法法則計(jì)算即可;
(4)根據(jù)分?jǐn)?shù)的加法法則計(jì)算即可;
(5)根據(jù)小數(shù)的加法法則計(jì)算即可;
(6)根據(jù)百分?jǐn)?shù)的乘法法則計(jì)算即可;
(7)根據(jù)分?jǐn)?shù)的減法法則計(jì)算即可;
(8)根據(jù)分?jǐn)?shù)與除法的關(guān)系計(jì)算即可;
(9)根據(jù)百分?jǐn)?shù)的減法法則計(jì)算即可;
(10)根據(jù)小數(shù)的除法法則計(jì)算即可.
解答:解:
(1)1.25×3×8=30; |
(2)436-297=139; |
(3)9×3.5=31.5; |
(4)+= |
(5)3.68+1.32=5; |
(6)100×2.8%=2.8; |
(7)6-2=3; |
(8)9÷19=; |
(9)-25%=0.25; |
(10)15.2÷0.1=152. |
點(diǎn)評(píng):此類型的題目計(jì)算比較簡(jiǎn)單,計(jì)算時(shí)要細(xì)心,注意小數(shù)點(diǎn)的位置.