考點(diǎn):分?jǐn)?shù)的四則混合運(yùn)算
專(zhuān)題:運(yùn)算順序及法則
分析:橫向數(shù):
(1)依據(jù)整數(shù)減小數(shù)計(jì)算方法解答,
(2)依據(jù)小數(shù)除法計(jì)算方法解答,
(3)依據(jù)分?jǐn)?shù)減法計(jì)算方法解答,
(4)運(yùn)用乘法結(jié)合律解答,
(5)依據(jù)分?jǐn)?shù)乘法計(jì)算方法解答,
(6)依據(jù)整數(shù)減分?jǐn)?shù)計(jì)算方法解答,
(7)依據(jù)整數(shù)除以分?jǐn)?shù)計(jì)算方法解答,
(8)(11)運(yùn)用乘法分配律解答,
(9)(12)按照從左到右順序計(jì)算解答,
(10)按照先算除法,再算加法計(jì)算方法解答.
解答:
解:78-0.98=77.02 | 0.54÷0.9=0.6 | -= | 2008×0.25×4=2008 |
×12=9 | 9-=8 | 9÷=27 | 15×(-)=2 |
2÷×=10 | +÷=1 | 0.9+99×0.9=90 | ×÷×= |
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,以及正確運(yùn)用簡(jiǎn)便方法解決問(wèn)題的能力.