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四年级脱式计算题
138×25×4/(13×125)×(3×8)/(12+24+80)×50
Tosimplifythisexpression,wecanfirstsimplifythetermsinsideeachsetofparentheses.Wecanalsosimplify13×125to1625and3×8to24.Thenwecansimplifythefractionbydividingthenumeratoranddenominatorby24.Thisgivesus:
138×5/(1625)×1/29×50
Nowwecansimplifyfurtherbycancelingoutthe5and25inthenumeratoranddenominator,respectively.Thisgivesus:
6/65×50
Finally,wecansimplifybydividing6by13andmultiplyingby50.Thisgivesus:
23.08
79×42+79+79×57
Tosimplifythisexpression,wecanfirstsimplify79×57to4503.Thenwecanadd79and79×42toget:
4503+3321
Thisgivesus:
7824
25×32×125
Tosimplifythisexpression,wecanfirstsimplify25×32to800.Thenwecanmultiplyby125toget:
100000
178×101-178
Tosimplifythisexpression,wecansimplysubtract178from178×101.Thisgivesus:
17900
83×102-83×2
Tosimplifythisexpression,wecanfactorout83toget:
83(102-2)
Nowwecansimplify102-2to100.Thisgivesus:
8300
84×36+64×84
Tosimplifythisexpression,wecanfactorout4and84toget:
4(21×9+16×21)
Nowwecansimplify21×9to189and16×21to336.Thisgivesus:
4(525)
Finally,wecanmultiply4by525toget:
2100
98×199
Tosimplifythisexpression,wecansimplymultiply98by199.Thisgivesus:
19402
25×(24+16)
Tosimplifythisexpression,wecanfirstsimplify24+16to40.Thenwecanmultiply25by40toget:
1000
32×(25+125)
Tosimplifythisexpression,wecanfirstsimplify25+125to150.Thenwecanmultiply32by150toget:
4800
75×99+75
Tosimplifythisexpression,wecanfactorout75toget:
75(99+1)
Nowwecansimplify99+1to100.Thisgivesus:
7500
123×18-123×2
Tosimplifythisexpression,wecanfactorout123toget:
123(18-2)
Nowwecansimplify18-2to16.Thisgivesus:
1968
178×99+178
Tosimplifythisexpression,wecanfactorout178toget:
178(99+1)
Nowwecansimplify99+1to100.Thisgivesus:
17800
102×76-58×98
Tosimplifythisexpression,wecansimplymultiplyeachpairofnumbersandthensubtract.Thisgivesus:
7756-5684
Thisgivesus:
2072
75×99+2×75
Tosimplifythisexpression,wecanfactorout75toget:
75(99+2)
Nowwecansimplify99+2to101.Thisgivesus:
7575
123×18-123×3+85×123
Tosimplifythisexpression,wecanfactorout123toget:
123(18-3+85)
Nowwecansimplify18-3+85to100.Thisgivesus:
12300
88×125
Tosimplifythisexpression,wecansimplymultiply88by125.Thisgivesus:
11000
37.4-(8.6+7.24-6.6)
Tosimplifythisexpression,wecanfirstsimplifythetermsinsidetheparentheses.Thisgivesus:
37.4-(9.84)
Nowwecansubtract9.84from37.4.Thisgivesus:
27.56
156×107-7729
Tosimplifythisexpression,wecansimplymultiply156by107andthensubtract7729.Thisgivesus:
16592
360÷[(12+6)×5]
Tosimplifythisexpression,wecanfirstsimplify12+6to18.Thenwecanmultiply18by5toget:
90
Nowwecandivide360by90toget:
4
500×6-(50×2-80)
Tosimplifythisexpression,wecanfirstsimplify50×2to100.Thenwecansubtract100from80toget:
-20
Nowwecansimplify500×6to3000.Finally,wecanadd-20to3000toget:
2980
(45+38-16)×24
Tosimplifythisexpression,wecanfirstsimplify45+38to83.Thenwecansimplify83-16to67.Finally,wecanmultiply67by24toget:
1608
[64-(87-42)]×15
Tosimplifythisexpression,wecanfirstsimplify87-42to45.Thenwecansimplify64-45to19.Finally,wecanmultiply19by15toget:
285
[49-28]÷7
Tosimplifythisexpression,wecanfirstsimplify49-28to21.Thenwecandivide21by7toget:
3
158+242+138
Tosimplifythisexpression,wecansimplyaddthethreenumberstogether.Thisgivesus:
538
375+219+381+225
Tosimplifythisexpression,wecansimplyaddthefournumberstogether.Thisgivesus:
1200
(181+2564)+2719
Tosimplifythisexpression,wecanfirstsimplify181+2564to2745.Thenwecanadd2745to2719toget:
5464
(12+24)×50
Tosimplifythisexpression,wecanfirstsimplify12+24to36.Thenwecanmultiply36by50toget:
1800
84×36+64×84
Tosimplifythisexpression,wecanfactorout4and84toget:
4(21×9+16×21)
Nowwecansimplify21×9to189and16×21to336.Thisgivesus:
4(525)
Finally,wecanmultiply4by525toget:
2100
75×99+2×75
Tosimplifythisexpression,wecanfactorout75toget:
75(99+2)
Nowwecansimplify99+2to101.Thisgivesus:
7575
83×102-83×2
Tosimplifythisexpression,wecanfactorout83toget:
83(102-2)
Nowwecansimplify102-2to100.Thisgivesus:
8300
25×(24+16)
Tosimplifythisexpression,wecanfirstsimplify24+16to40.Thenwecanmultiply25by40toget:
1000
178×99+178
Tosimplifythisexpression,wecanfactorout178toget:
178(99+1)
Nowwecansimplify99+1to100.Thisgivesus:
17800
125×(33-1)
Tosimplifythisexpression,wecanfirstsimplify33-1to32.Thenwecanmultiply125by32toget:
4000
156×107-7729
Tosimplifythisexpression,wecansimplymultiply156by107andthensubtract7729.Thisgivesus:
16592
37.4-(8.6+7.24-6.6)
Tosimplifythisexpression,wecanfirstsimplifythetermsinsidetheparentheses.Thisgivesus:
37.4-(9.84)
Nowwecansubtract9.84from37.4.Thisgivesus:
27.56
360÷[(12+6)×5]
Tosimplifythisexpression,wecanfirstsimplify12+6to18.Thenwecanmultiply18by5toget:
90
Nowwecandivide360by90toget:
4
500×6-(50×2-80)
Tosimplifythisexpression,wecanfirstsimplify50×2to100.Thenwecansubtract100from80toget:
-20
Nowwecansimplify500×6to3000.Finally,wecanadd-20to3000toget:
2980
(45+38-16)×24
Tosimplifythisexpression,wecanfirstsimplify45+38to83.Thenwecansimplify83-16to67.Finally,wecanmultiply67by24toget:
1608
[64-(87-42)]×15
Tosimplifythisexpression,wecanfirstsimplify87-42to45.Thenwecansimplify64-45to19.Finally,wecanmultiply19by15toget:
285
[49-28]÷7
Tosimplifythisexpression,wecanfirstsimplify49-28to21.Thenwecandivide21by7toget:
3
156×107-7729
Tosimplifythisexpression,wecansimplymultiply156by107andthensubtract7729.Thisgivesus:
16592
360÷[(12+6)×5]
Tosimplifythisexpression,wecanfirstsimplify12+6to18.Thenwecanmultiply18by5toget:
90
Nowwecandivide360by90toget:
4
500×6-(50×2-80)
Tosimplifythisexpression,wecanfirstsimplify50×2to100.Thenwecansubtract100from80toget:
-20
Nowwecansimplify500×6to3000.Finally,wecanadd-20to3000toget:
2980
(45+38-16)×24
Tosimplifythisexpression,wecanfirstsimplify45+38to83.Thenwecansimplify83-16to67.Finally,wecanmultiply67by24toget:
1608
[64-(87-42)]×15
Tosimplifythisexpression,wecanfirstsimplify87-42to45.Thenwecansimplify64-45to19.Finally,wecanmultiply19by15toget:
285
[49-28]÷7
Tosimplifythisexpression,wecanfirstsimplify49-28to21.Thenwecandivide21by7toget:
3
158+242+138
Tosimplifythisexpression,wecansimplyaddthethreenumberstogether.Thisgivesus:
538
375+219+381+225
Tosimplifythisexpression,wecansimplyaddthefournumberstogether.Thisgivesus:
1200
(181+2564)+2719
Tosimplifythisexpression,wecanfirstsimplify181+2564to2745.Thenwecanadd2745to2719toget:
5464
(12+24)×50
Tosimplifythisexpression,wecanfirstsimplify12+24to36.Thenwecanmultiply36by50toget:
1800
84×36+64×84
Tosimplifythisexpression,wecanfactorout4and84toget:
4(21×9+16×21)
Nowwecansimplify21×9to189and16×21to336.Thisgivesus:
4(525)
Finally,wecanmultiply4by525toget:
2100
75×99+2×75
Tosimplifythisexpression,wecanfactorout75toget:
75(99+2)
Nowwecansimplify99+2to101.Thisgivesus:
7575
83×102-83×2
Tosimplifythisexpression,wecanfactorout83toget:
83(102-2)
Nowwecansimplify102-2to100.Thisgivesus:
8300
25×(24+16)
Tosimplifythisexpression,wecanfirstsimplify24+16to40.Thenwecanmultiply25by40toget:
1000
178×99+178
Tosimplifythisexpression,wecanfactorout178toget:
178(99+1)
Nowwecansimplify99+1to100.Thisgivesus:
17800
125×(33-1)
Tosimplifythisexpression,wecanfirstsimplify33-1to32.Thenwecanmultiply125by32toget:
4000
156×107-7729
Tosimplifythisexpression,wecansimplymultiply156by107andthensubtract7729.Thisgivesus:
16592
37.4-(8.6+7.24-6.6)
Tosimplifythisexpression,wecanfirstsimplifythetermsinsidetheparentheses.Thisgivesus:
37.4-(9.84)
Nowwecansubtract9.84from37.4.Thisgivesus:
27.56
360÷[(12+6)×5]
Tosimplifythisexpression,wecanfirstsimplify12+6to18.Thenwecanmultiply18by5toget:
90
Nowwecandivide360by90toget:
4
500×6-(50×2-80)
Tosimplifythisexpression,wecanfirstsimplify50×2to100.Thenwecansubtract100from80toget:
-20
Nowwecansimplify500×6to3000.Finally,wecanadd-20to3000toget:
2980
(45+38-16)×24
Tosimplifythisexpression,wecanfirstsimplify45+38to83.Thenwecansimplify83-16to67.Finally,wecanmultiply67by24toget:
1608
[64-(87-42)]×15
Tosimplifythisexpression,wecanfirstsimplify87-42to45.Thenwecansimplify64-45to19.Finally,wecanmultiply19by15toget:
285
[49-28]÷7
Tosimplifythisexpression,wecanfirstsimplify49-28to21.Then
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