题目内容
直接写得数．
81÷27＝ 70×60＝ 2400÷80＝
答案：3;4200;30
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直接写得数．
| 81÷9= | 730×0= | 300+99= | 33÷8= |
| 8×60= | 400×5= | 511+189= | 200-178= |
 + = | 1- = |  - = |  + = |
| 62×6≈ | 38×9≈ | 287×7≈ | 302×5≈ |
直接写得数
 ×8= |  × = | 81÷ = |  ÷ = | 63÷ = |
 ÷ = |  × ×= | 3× ÷3×= | 36×25%= | （ - ）×24= |