题目内容
口算
(1)0÷4＝
(2)250÷5＝
(3)130×5＝
(4)270÷9＝
答案：0;50;650;30
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口算
1 - +0.8= | 7.4-（1 + ）= | 1 - - = | 1.25×7×8= | 12 ÷3= |
| 0.25×0.4= | 4.4-3= | 4÷0.25= | 3÷10%= | 11 ×6= |
 +1÷2 = |  ×（1-）= | 2×0.75= |  ÷ = | 5÷25÷0.4= |
| 0.8××5= | ÷×= | （0.18+ ）÷9= |  × ÷×= | ×÷= |
口算
| 1÷0.01= | 2.4× = | 456-199= | 0.25÷= |
| +0.25= |  = |  = |  = |
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