= 
﹣7.8﹣2.2= 2.4÷
= 4.2+0.85=
= 3.1﹣
= 
÷6= （
+
）×12=相关试题
口算．
| 35×2= |
17×4= |
16×4= |
38×2= |
| 120×6= |
130×7= |
270×5= |
480×3= |
| 150×5= |
240×3= |
260×3= |
230×4= |
| 9×14= |
2×450= |
5×16= |
24×5= |
| 250×4= |
26×3= |
6×140= |
270×3= |
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