24×5= 65-56= 400÷8= 4×50=
810÷9= 600×7= 270+72= 100-1=
12+8×3= 56÷7÷2= 100-12+28= 135+83+17=
2×8×5= 30-0÷6= 20×30÷20= 4×0×7=
分析:本題根據(jù)整數(shù)乘法與除法、加法與減法的運(yùn)算法則計(jì)算即可.
135+83+17可根據(jù)加法結(jié)合律計(jì)算,20×30÷20可根據(jù)乘法交換律計(jì)算.
解答:解:
24×5=120 65-56=9 400÷8=50 4×50=200
810÷9=90 600×7=4200 270+72=342 100-1=99
12+8×3=36 56÷7÷2=4 100-12+28=116 135+83+17=235
2×8×5=80 30-0÷6=30 20×30÷20=30 4×0×7=0
點(diǎn)評(píng):完成本題要注意分析式中數(shù)據(jù)的特點(diǎn),然后快速準(zhǔn)確得出答案.
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