考點(diǎn):分?jǐn)?shù)的加法和減法,小數(shù)的加法和減法,小數(shù)乘法,小數(shù)除法
專題:運(yùn)算順序及法則
分析:橫向數(shù):
(1)(3)(11)(14)(16)(20)依據(jù)分?jǐn)?shù)加減法計(jì)算方法即可解答,
(2)(13)(17)依據(jù)小數(shù)加減法計(jì)算方法即可解答,
(4)(5)(6)(7)(8)(9)(10)(12)(15)(18)(19)依據(jù)小數(shù)乘除法計(jì)算方法即可解答.
解答:
解:+=1 |
2.25+1.75=4 |
1-= |
12.5×8=100 |
1.8÷0.3=6 |
6.5÷5=1.3 |
7.2÷90=0.08 |
24.8÷8=3.1 |
0.23×20=4.6 |
5.6÷0.8=7 |
-= |
40×0.9=36 |
1.63+7=8.63 |
-= |
6.1×0.7=42.7 |
+= |
20.5-1.5=19 |
35÷0.7=50 |
2.5×4=10 |
3-1=1 |
點(diǎn)評(píng):依據(jù)分?jǐn)?shù)和小數(shù)四則運(yùn)算計(jì)算方法正確進(jìn)行計(jì)算,是本題考查知識(shí)點(diǎn).