| 直接写出得数 60×20= | 1000÷5= | 30×13= | 1- = |
| 22×40= | 9.4+1.6= | 17×15= | 189÷9= |
0× = | 50×120= | - = | - = |
| 解:60×20=1200, | 1000÷5=200, | 30×13=390, | 1- = , |
| 22×40=440, | 9.4+1.6=11, | 17×15=255, | 189÷9=21, |
0× =0, | 50×120=6000, | - = , | - =- . |
分析:本题根据整数、小数、分数、的乘法、除法、加法及减法的运算法则计算即可.
点评:
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不够减,可先用
去减
,然后在得数后加上“-”号即可.
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