用简便方法计算下面各题。
7个回答
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24×(3分之2-4分之1+12分之5)
=24*(2/3-1/4+5/12)
=24*(2/3)-24*(1/4)+24*(5/12)
=16-6+10
=20
27又20分之9÷9
=(27+9/20)÷9
=27÷9+(9/20)÷9
=3+1/20
=3又20分之1
9300÷5÷6
=(93*100)÷5÷3÷2
=(93÷3)*(100÷5÷2)
=31*10
=310
175000÷125
=(175*1000)÷(25*5)
=(175÷5)*(1000÷25)
=35*40
=1400
=24*(2/3-1/4+5/12)
=24*(2/3)-24*(1/4)+24*(5/12)
=16-6+10
=20
27又20分之9÷9
=(27+9/20)÷9
=27÷9+(9/20)÷9
=3+1/20
=3又20分之1
9300÷5÷6
=(93*100)÷5÷3÷2
=(93÷3)*(100÷5÷2)
=31*10
=310
175000÷125
=(175*1000)÷(25*5)
=(175÷5)*(1000÷25)
=35*40
=1400
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简便方法计算就是利用结合律、分配律、交换律等先凑整百、整十后计算
(1)13.2-(3.7+6.3)=
(2)10.56-5.56-3.78
(3)5/12×24+7/8×24
(4)(100+1)×7.8-7.8
(5)5/6+1/6+5.2+4.8
(1)13.2-(3.7+6.3)=
(2)10.56-5.56-3.78
(3)5/12×24+7/8×24
(4)(100+1)×7.8-7.8
(5)5/6+1/6+5.2+4.8
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9÷0.125
=(9×8)÷(0.125×8)
=72÷1
=72
25.25×0.65×4÷0.65
=(25.25×4)×(0.65÷0.65)
=101×1
=101
0.93×1.01
=0.93×(1+0.01)
=0.93×1+0.93×0.01
=0.93+0.0093
=0.9393
6.24-3.34-2.66
=6.24-(3.34+2.66)
=6.24-6
=0.24
0.485×102-48.5
=0.485×(100+2)-48.5
=0.485×100+0.485×2-48.5
=48.5-48.5+0.97
=0.97
4.4+4.4×12+13×5.6
=4.4×(1+12)+13×5.6
=4.4×13+13×5.6
=13×(4.4+5.6)
=13×10
=130
=(9×8)÷(0.125×8)
=72÷1
=72
25.25×0.65×4÷0.65
=(25.25×4)×(0.65÷0.65)
=101×1
=101
0.93×1.01
=0.93×(1+0.01)
=0.93×1+0.93×0.01
=0.93+0.0093
=0.9393
6.24-3.34-2.66
=6.24-(3.34+2.66)
=6.24-6
=0.24
0.485×102-48.5
=0.485×(100+2)-48.5
=0.485×100+0.485×2-48.5
=48.5-48.5+0.97
=0.97
4.4+4.4×12+13×5.6
=4.4×(1+12)+13×5.6
=4.4×13+13×5.6
=13×(4.4+5.6)
=13×10
=130
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9/0.125=9/(1/8)=9*8=72
0.125=1/8
25.25*0.65*4/0.65=25.25*4=101
分子0.65与
分母
0.65约掉
0.93*1.01=0.93*(1+0.01)=0.93+0.0093=0.9393
0.485*102-48.5=0.485*(100+2)-48.5=48.5+0.97-48.5=0.97
4.4+4.4*12+13*5.6=1.4*13+13*5.6=13*(4.4+5.6)=13*10=130
0.125=1/8
25.25*0.65*4/0.65=25.25*4=101
分子0.65与
分母
0.65约掉
0.93*1.01=0.93*(1+0.01)=0.93+0.0093=0.9393
0.485*102-48.5=0.485*(100+2)-48.5=48.5+0.97-48.5=0.97
4.4+4.4*12+13*5.6=1.4*13+13*5.6=13*(4.4+5.6)=13*10=130
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