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下面各题,怎样简便就怎样计算.546-127-37376+141+59+1242400÷25÷445×9+4530×28-30×13808×125.
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答案和解析
(1)546-127-373 =546-(127+373) =546-500 =46; (2)76+141+59+124 =76+124+(141+59) =200+200 =400; (3)2400÷25÷4 =2400÷(25×4) =2400÷100 =24; (4)45×9+45 =45×(9+1) =45×10 =450; (5)30×28-30×13 =30×(28-13) =30×15 =450; (6)808×125 =(800+8)×125 =8×125+800×125 =1000+100000 =101000. |
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