30×23=80÷4=33-18=400÷5=45+27=
40×22=94-57=70×80=0÷5=41×20=
480÷2=360÷9=400÷8=210÷7=數(shù)學公式+數(shù)學公式=
數(shù)學公式-數(shù)學公式=數(shù)學公式+數(shù)學公式=數(shù)學公式-數(shù)學公式=數(shù)學公式-數(shù)學公式=數(shù)學公式+數(shù)學公式=

解:30×23=69080÷4=2033-18=15400÷5=8045+27=72
40×22=88094-57=3770×80=56000÷5=041×20=820
480÷2=240360÷9=40400÷8=50210÷7=30+=
-=+=-=-=+=1

分析:根據(jù)整數(shù)、分數(shù)加減乘除法的計算方法進行解答即可.
點評:此題考查了整數(shù)、分數(shù)加減乘除法的口算能力,注意認真計算即可.
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