考點(diǎn):分?jǐn)?shù)的四則混合運(yùn)算
專題:運(yùn)算順序及法則
分析:橫向數(shù):
(1)(6)依據(jù)分?jǐn)?shù)乘法計(jì)算方法解答,
(2)依據(jù)分?jǐn)?shù)除法計(jì)算方法解答,
(3)化1.6=8×0.2,再運(yùn)用乘法結(jié)合律解答,
(4)(8)(9)(10)按照從左到右順序計(jì)算解答,
(5)(11)按照小數(shù)乘法計(jì)算方法解答,
(7)按照先算第二級(jí)運(yùn)算,再算第一級(jí)運(yùn)算順序計(jì)算解答,
(12)按照化分?jǐn)?shù)為小數(shù),再運(yùn)用小數(shù)加法計(jì)算方法解答.
解答:
解:×=,÷= | 125×1.6=200 | 7×÷7×= | 3.14×5=15.7 |
75×10%=7.5 | ÷3-=0,7÷×7÷=87 | 1-+=1 | 0.5-+0.5-=0.6 |
3.14×40=125.6 | 8.1+=8.35 |
故答案為:
,
,200,
,15.7,7.5,0,87
,1
,0.6,125.6,8.35.
點(diǎn)評(píng):本題主要考查學(xué)生依據(jù)四則運(yùn)算計(jì)算方法正確進(jìn)行計(jì)算的能力,關(guān)鍵是計(jì)算結(jié)果要準(zhǔn)確.