题干
口算，直接写出得数．
+
=____
−
=____ 24×
=____ 21÷
=____
486﹣186=____ 250+250=____ 0.25×0.8=____ 4.2÷6=____
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 5 |
| 3 |
| 8 |
| 3 |
| 7 |
答案(点此获取答案解析）
300,500,0.2,0.7,,
