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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