作业帮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
=(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