求教!要式子.201*316= 374-205+226-95= 3000-999= 997*7+21= 102*99= 2*125= 645+80-245= 382*101-382= 4*60*50*8= 35*8+35*64*35= 25*125*32= (29*125)*8= 404*25= 156*101-156= 102*32= 125*17*8= 324+92+276-92= 26*99= 125*89*8= 99+49*99= 264*9+4*264= 1

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/04 21:55:32
求教!要式子.201*316= 374-205+226-95= 3000-999= 997*7+21= 102*99= 2*125= 645+80-245= 382*101-382= 4*60*50*8= 35*8+35*64*35= 25*125*32= (29*125)*8= 404*25= 156*101-156= 102*32= 125*17*8= 324+92+276-92= 26*99= 125*89*8= 99+49*99= 264*9+4*264= 1

求教!要式子.201*316= 374-205+226-95= 3000-999= 997*7+21= 102*99= 2*125= 645+80-245= 382*101-382= 4*60*50*8= 35*8+35*64*35= 25*125*32= (29*125)*8= 404*25= 156*101-156= 102*32= 125*17*8= 324+92+276-92= 26*99= 125*89*8= 99+49*99= 264*9+4*264= 1
求教!要式子.
201*316= 374-205+226-95= 3000-999= 997*7+21= 102*99= 2*125= 645+80-245= 382*101-382= 4*60*50*8= 35*8+35*64*35= 25*125*32= (29*125)*8= 404*25= 156*101-156= 102*32= 125*17*8= 324+92+276-92= 26*99= 125*89*8= 99+49*99= 264*9+4*264= 125*47-47*25= 87*470+870*5= (55+55+55+55*5)*125=

求教!要式子.201*316= 374-205+226-95= 3000-999= 997*7+21= 102*99= 2*125= 645+80-245= 382*101-382= 4*60*50*8= 35*8+35*64*35= 25*125*32= (29*125)*8= 404*25= 156*101-156= 102*32= 125*17*8= 324+92+276-92= 26*99= 125*89*8= 99+49*99= 264*9+4*264= 1
201*316
=(200+1)*316
=200*316+316
=63516
374-205+226-95
=(374+226)-(205+95)
=600-300
=300
3000-999
=3000-1000+1
=2001
997*7+21
=997*7+3*7
=(997+3)*7
=7000
102*99
=102*(100-1)
=102*100-102*1
=10098
2*125
=2*(100+20+5)
=2*100+2*20+2*5
=250
645+80-245
=645-245+80
=480
382*101-382
=382*(101-1)
=38200
4*60*50*8
=(4*60)*(50*8)
=240*400
=96000
25*125*32
=25*125*8*4
=(25*4)*(125*8)
=100*1000
=100000
(29*125)*8
=29*(125*8)
=29*1000
=29000
=(400+4)*25
=400*25+4*25
=10000+100
=10100
156*101-156
=156*101-156*1
=156*(101-1)
=15600
102*32
=(100+2)*32
=100*32+2*32
=3264
125*17*8
=(125*8)*17
=17000
324+92+276-92
=(324+276)+(92-92)
=600
26*99
=26*(100-1)
=26*100-26*1
=2600-26
=2574
125*89*8
=(125*8)*98
=98000
99+49*99
=99*1+49*99
=99*(1+49)
=4950
125*47-47*25
=47*(125-25)
=4700
87*470+870*5
=870*47+870*5
=870*(47+5)
(55+55+55+55*5)*125
=(55*8)*125
=55*(8*125)
=55000

(200+1)*316=200*316+316*1=30560
374-205+226-95=(374+226)-(205+95)=其实这些题就是让你“凑整”计算,下面的依照上面的方法很容意计算出来,

(200+1)*(300+16)=200*300+1*300+200*16+1*16=63516
(374+226)-(205+95)=300
2000+(1000-999)=2001
(1000-3)*7+21=7000-21+21=7000
(100+2)*(100-1)=100*100+2*100-100*1-2*1=10098
2*(100+25)=...

全部展开

(200+1)*(300+16)=200*300+1*300+200*16+1*16=63516
(374+226)-(205+95)=300
2000+(1000-999)=2001
(1000-3)*7+21=7000-21+21=7000
(100+2)*(100-1)=100*100+2*100-100*1-2*1=10098
2*(100+25)=250
(645-245)+80=480
382*(101-1)=38200
其实就是把一个复杂一点的数拆开和后面的数尽量计算起来为常见的式子,自己再试试看,不懂再问,嘿~~掌握方法重要

收起

63516 300 2901 7000 10098 250 480 38200 96000

(99-98)(99+98)=197

分别是; 63516 300 2901 7000 10098 250 480 38200 96000

分别是:30560 64756 85475 7787778 888

200X316+1X316=63200+316=63516, 374+226-(205+95)=600—300=300, 3000-(999+1)-1=3000-1000-1=2000-1=1999, (1000-3)X7+21=1000X7-3X7+21=7000, (100+2)X99=100X99+2X99=9900+198=10098, 2X(100+25)=2X100+2X25=200+50=250, 645-245+80=400+80=480, 382X(100+1)-382X1=382X(100+1-1)=38200, (50X60)X(4X8)=3000X32=9600,