計(jì)算下面各題,能筒算的要簡算。
(1)81÷0.9÷1× (2)[+16.5÷(3-1.75)]×
(3)5.02-1.37-2.63 (4)×(+)+0.8 (5):X=0.32:4.8
(6)1+3+5+7+9+11+13+15+17+19
(1)原式=÷0.9÷1×
    =÷1×
    =××
    =
(2)原式=(+16.5÷1.65)×
    =(+10)×
    =×
    =
(3)原式=5.02-(1.37+2.63)
    =5.02-4
    =1.02
(4)原式=×+×+0.8
    =2++
    = 4
(5):X=0.32:4.8
   0.32X= 4.8×
     X=3
(6)100
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