解:(1)4.06+0.4=4.46 | (2)15×0.3=4.5 | (3)20÷=25 | (4)1.5-=1 | (5)7-=6.4 |
(6)÷2= | (7)×18=4 | (8)+= | (9)168+98=266 | (10)×0.4×=0.4 |
分析:(1)根據(jù)小數(shù)加法的計(jì)算方法計(jì)算,
(2)根據(jù)小數(shù)乘法的計(jì)算方法計(jì)算,
(3)先把分?jǐn)?shù)化成小數(shù),再根據(jù)小數(shù)除法的計(jì)算方法計(jì)算,
(4)先把分?jǐn)?shù)化成小數(shù),再根據(jù)小數(shù)減法的計(jì)算方法計(jì)算,
(5)先把分?jǐn)?shù)化成小數(shù),再根據(jù)小數(shù)減法的計(jì)算方法計(jì)算,
(6)根據(jù)分?jǐn)?shù)除法的計(jì)算方法計(jì)算,
(7)根據(jù)分?jǐn)?shù)乘法的計(jì)算方法計(jì)算,
(8)根據(jù)分?jǐn)?shù)加法的計(jì)算方法計(jì)算,
(9)用168加100再減2進(jìn)行解答,
(10)根據(jù)乘法交換律進(jìn)行計(jì)算.據(jù)此解答.
點(diǎn)評(píng):本題綜合考查了學(xué)生的計(jì)算能力,注意要細(xì)心.