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  • 0.95*8.6-7.6*0.9請用簡便方法計(jì)算

    0.95*8.6-7.6*0.9請用簡便方法計(jì)算
    數(shù)學(xué)人氣:154 ℃時(shí)間:2020-04-04 08:34:31
    優(yōu)質(zhì)解答
    參考:0.95*8.6-7.6*0.9 = 1.33
    能簡便的用簡便方法計(jì)算.
    75+8.95+10.25 6.38-1.8+3.62
    95÷1.25÷0.8 9.4×5-10.6.
    7×9.9+0.1×0.7 13.8+15.6÷0.4.
    85×1.25+0.85×1.75 2.15×0.9+21.5×0.11.
    (1)75+8.95+10.25
    =75+(8.95+10.25)
    =75+19.2
    =94.2
    (2)6.38-1.8+3.62
    =(6.38+3.62)-1.8
    =10-1.8
    =8.2
    (3)95÷1.25÷0.8
    =95÷(1.25×0.8)
    =95÷1
    =95
    (4)9.4×5-10.6
    =47-10.6
    =36.4
    (5)7×9.9+0.1×0.7
    =7×9.9+0.01×7
    =7×(9.9+0.01)
    =7×9.91
    =7×(10-0.09)
    =7×10-7×0.09
    =70-0.63
    =69.37
    (6)13.8+15.6÷0.4
    =13.8+39
    =52.8
    (7)85×1.25+0.85×1.75
    =106.25+1.4875
    =107.7375
    (8)2.15×0.9+21.5×0.11
    =2.15×0.9+2.15×1.1
    =2.15×(0.9+1.1)
    =2.15×2
    =4.3
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