题目

下面各题,怎样简便就怎样算,要写出必要的计算过程。 ①(270+35×6)÷80 ②13×[(295-45)÷5] ③2700÷25÷4 ④88+88×99 ⑤4.56-2.19+0.44 ⑥98.2+(32.5-13.7) 答案:①(270+35×6)÷80 =(270+210)÷80 =480÷80 =6 ②13×[(295-45)÷5] =13×(250÷5) =13×50 =650 ③2700÷25÷4 =2700÷(25×4) =2700÷100 =27 ④88+88×99 =88×(1+99) =88×100 =8800 ⑤4.56-2.19+0.44 =4.56+0.44-2.19 =5-2.19 =2.81 ⑥98.2+(32.5-13.7) =98.2+18.8 =117
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