Question

口算． 5.3+3.53=	220×40=	15×20=	1-0.01=
0.33+1.4=	2.5+6=	33×50=	180×4=
1 3 + 1 2 =	2 12 + 7 12 =	5 6 - 3 18 =	1 5 - 1 7 =

Answer 1

考點(diǎn)：小數(shù)的加法和減法,整數(shù)的乘法及應(yīng)用,分?jǐn)?shù)的加法和減法

專題：運(yùn)算順序及法則

分析：本題運(yùn)用小數(shù)、分?jǐn)?shù)的加減法的計(jì)算法則及整數(shù)乘法的計(jì)算法則進(jìn)行計(jì)算即可．

解答：

解：5.3+3.53=8.83	220×40=8800	15×20=300	1-0.01=0.99
0.33+1.4=1.73	2.5+6=8.5	33×50=1650	180×4=720
1 3 + 1 2 = 5 6	2 12 + 7 12 = 3 4	5 6 - 3 18 = 2 3	1 5 - 1 7 = 2 35

點(diǎn)評：本題在用分?jǐn)?shù)當(dāng)做計(jì)算結(jié)果的時(shí)候，注意把分?jǐn)?shù)化成最簡分?jǐn)?shù)進(jìn)行解答即可．