考點(diǎn):分?jǐn)?shù)除法,分?jǐn)?shù)的加法和減法,分?jǐn)?shù)乘法,小數(shù)的加法和減法,小數(shù)乘法,小數(shù)除法
專題:計(jì)算題
分析:分?jǐn)?shù)乘整數(shù),用分?jǐn)?shù)的分子和整數(shù)相乘的積做分子,分母不變;分?jǐn)?shù)乘分?jǐn)?shù),用分子相乘的積做分子,分母相乘的積做分母,能約分的要約分;分?jǐn)?shù)除以一個(gè)數(shù)(0除外),等于乘這個(gè)數(shù)的倒數(shù).
解答:
解:
÷= | ×= | ÷3= | 1-×=0 | 64%+36%=1 |
×= | 0.72+0.28=1 | -= | ×= | ×= |
×18=14 | ÷ | ÷= | 21÷=27 | ÷= |
×= | ÷= | ×8=6 | 3÷=15 | ÷= |
÷= | ÷= | ÷= | ÷4= | ×= |
×6= | 4×=3 | ×=3 | ×= | ×= |
×= | ×= | 85%-45%= | ×= | 1.2-0.9=0.3 |
0.5×0.2=0.1 | 1.2÷0.4=3 | 12×=9 | ÷25%=1 | ×= |
點(diǎn)評(píng):此題主要考查分?jǐn)?shù)四則混合運(yùn)算的方法的靈活應(yīng)用.