分析:(1)(10)根據(jù)小數(shù)乘法法則計(jì)算即可;
(2)先算平方,再算加法;
(3)根據(jù)小數(shù)除法法則計(jì)算即可;
(4)0乘任何數(shù)都得0;
(5)根據(jù)小數(shù)減法法則計(jì)算即可;
(6)根據(jù)百分?jǐn)?shù)除法法則計(jì)算即可;
(7)根據(jù)分?jǐn)?shù)除法法則計(jì)算即可;
(8)(12)從左往右依次計(jì)算即可;
(9)根據(jù)小數(shù)減法法則計(jì)算即可;
(11)根據(jù)分?jǐn)?shù)乘法法則計(jì)算即可.
解答:解:
(1)0.5×400=200,; |
(2)32+52=34; |
(3)2.4÷0.06=40; |
(4)118÷198×0=0; |
(5)1.5-0.8=0.7; |
(6)9.5÷1%=950; |
(7)÷3=; |
(8)4÷4×=; |
(9)12.2-2.9=9.3; |
(10)4.5×100=450; |
(11)32×=4; |
(12)×4÷×4=16. |
點(diǎn)評(píng):考查了四則運(yùn)算,關(guān)鍵是熟悉運(yùn)算法則和運(yùn)算順序,是基礎(chǔ)題型,計(jì)算時(shí)要細(xì)心.