题目内容
算一算.
81÷9= | 8×9-27= | 45÷5+21= | 3×3×6= | 4×9÷6= |
36÷4÷3= | 2×4×5= | 63÷9×4= | 3×8-11= | 40-4×9= |
30÷6×9= | 72÷8÷3= | 8×9-9= | 6×9-6= | 9×9-30= |
分析:根据整数加减乘除的计算方法进行计算即可.
解答:
解:81÷9=9, | 8×9-27=45, | 45÷5+21=30, | 3×3×6=54, | 4×9÷6=6, |
36÷4÷3=3, | 2×4×5=40, | 63÷9×4=28, | 3×8-11=13, | 40-4×9=4, |
30÷6×9=45, | 72÷8÷3=3, | 8×9-9=63, | 6×9-6=48, | 9×9-30=51. |
点评:口算时,注意运算符号和数据,然后再进一步计算即可.
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算一算.
81÷9= | 8×9-27= | 45÷5+21= | 3×3×6= | 4×9÷6= |
36÷4÷3= | 2×4×5= | 63÷9×4= | 3×8-11= | 40-4×9= |
30÷6×9= | 72÷8÷3= | 8×9-9= | 6×9-6= | 9×9-30= |