题目内容
| 口算能手. 42×20= | 25×40= | 810÷3= | 3.5+6.5= |
| 21×30= | 600÷6= | 4.2-1.2= | 420÷7= |
| 13×11= | 250÷5= | 0.5+0.4= | 240÷6= |
| 0×30= | 12.5-0.3= | 270÷9= | 15×40= |
| 0÷125+1= | 6.3+3.6= | 24×50= | 50×20= |
| 42×20=840; | 25×40=1000; | 810÷3=270; | 3.5+6.5=10; |
| 21×30=630; | 600÷6=100; | 4.2-1.2=3; | 420÷7=60; |
| 13×11=143; | 250÷5=50; | 0.5+0.4=0.9; | 240÷6=40; |
| 0×30=0 | 12.5-0.3=12.2; | 270÷9=30; | 15×40=600; |
| 0÷125+1=1; | 6.3+3.6=9.9; | 24×50=1200; | 50×20=1000. |
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