问题标题:
怎样简便就怎样计算(124-85)×12÷2675+240÷40-25367-144÷24×13355+260+140+24598×10148×125645-180-245.
问题描述:

怎样简便就怎样计算

(124-85)×12÷26               75+240÷40-25
367-144÷24×13                 355+260+140+245
98×101              48×125              
645-180-245.

任玉芳回答:
  (1)(124-85)×12÷26   =39×12÷26   =468÷26   =18;   (2)75+240÷40-25   =75+6-25   =81-25   =56;   (3)367-144÷24×13   =367-6×13   =367-78   =289;   (4)355+260+140+245   =355+245+(260+140)   =600+400   =1000;   (5)98×101   =98×(100+1)   =98×100+98×1   =9800+98   =9898;   (6)48×125   =6×(8×125)   =6×1000   =6000;   (7)645-180-245   =465-245   =220.
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