脱式计算（1）7×8+23 （2）（51﹣23）÷7 （3）48+4×6（4）63÷（36﹣29） （5）86﹣6×9 （6）（36+45）÷9．
计算下面各题．=========
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直接写出得数．============
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直接写出得数．== 1﹣= 4﹣=====
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