10.76-0.83+1.24-4.17 3.5/0.56 45/0.18 81.3-81.3x0.9 这几题的简便计算怎样算

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10.76-0.83+1.24-4.17 3.5/0.56 45/0.18 81.3-81.3x0.9 这几题的简便计算怎样算

10.76-0.83+1.24-4.17 3.5/0.56 45/0.18 81.3-81.3x0.9 这几题的简便计算怎样算
10.76-0.83+1.24-4.17 3.5/0.56 45/0.18 81.3-81.3x0.9 这几题的简便计算怎样算

10.76-0.83+1.24-4.17 3.5/0.56 45/0.18 81.3-81.3x0.9 这几题的简便计算怎样算
10.76-0.83+1.24-4.17
=(10.76+1.24)-(0.83+4.17)
=12-5
=7
3.5/0.56
=3.5÷(0.7×0.8)
=3.5÷0.7÷0.8
=5÷0.8
=6.25
45/0.18
=45÷(0.9×0.2)
=45÷0.9÷0.2
=50÷0.2
=250
81.3-81.3x0.9
=81.3×(1-0.9)
=81.3×0.1
=8.13

10.76-0.83+1.24-4.17
=(10.76+1.24)-(0.83+4.17)
=12-5
=7
3.5/0.56
=0.5*7/(7*0.08)
=0.5/0.08
=25/4
45/0.18
=5*9/(0.02*9)
=5/0.02
=250
81.3-81.3x0.9
=81.3*(1-0.9)
=81.3*0.1
=8.13

第三题:2.24×0.18÷3.5 =7×0.32×0.18÷3.5 =2×0.32×0.=0.128-0.0128 =0.1152 开玩笑 这门简便方法

额。第一个 = (10.76+1.24)-(0.83+4.17)
二:=5/0.8
三:=4500/18=500/2=250
四:=81.3*(1-0.9)=81.3*0.1=8.13

10.76-0.83+1.24-4.17
=(10.76+1.24)- (0.83+4.17)
=12 - 5
=7
3.5/0.56
= 5×0.7/(0.7×0.8)
= 5/0.8
= 6.25
45/0.18
= 45/(9×0.02)
= 5/0.02
= 250
81.3-81.3x0.9
=81.3×(1-0.9)
=81.3×0.1
=8.13