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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:本题根据整数乘法与除法、加法与减法的运算法则计算即可.
135+83+17可根据加法结合律计算,20×30÷20可根据乘法交换律计算.
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
点评:完成本题要注意分析式中数据的特点,然后快速准确得出答案.
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