[小学四年级数学上册口算题]640÷80= 15*5= 23*3= 12*2*5= 480÷80= 16*5= 27*3= 90÷15= 48÷4= 640÷16= 39÷3= 24*20= 32*3= 48÷16= 12*8= 27*3= 56÷14= 24÷8= 14*2= 83-45= 560÷80= 96÷24= 4...+阅读
1.25*(8+10)
=1.25*8+1.25*10
=10+12.5=22.5
9123-(123+8.8)
=9123-123-8.8
=9000-8.8
=8991.2
1.24*8.3+8.3*1.76
=8.3*(1.24+1.76)
=8.3*3=24.9
9999*1001
=9999*(1000+1)
=9999*1000+9999*1
=10008999
14.8*6.3-6.3*6.5+8.3*3.7
=(14.8-6.5)*6.3+8.3*3.7
=8.3*6.3+8.3*3.7
8.3*(6.3+3.7)
=8.3*10
=83
1.24+0.78+8.76
=(1.24+8.76)+0.78
=10+0.78
=10.78
933-157-43
=933-(157+43)
=933-200
=733
4821-998
=4821-1000+2
=3823
I32*125*25
=4*8*125*25
=(4*25)*(8*125)
=100*1000
=100000
9048÷268
=(2600+2600+2600+1248)÷26
=2600÷26+2600÷26+2600÷26+1248÷269
=100+100+100+48
=348
2881÷ 43
=(1290+1591)÷ 434
=1290÷43+1591÷43
=30+37
3.2*42.3*3.75-12.5*0.423*16
=3.2*42.3*3.75-1.25*42.3*1.6
=42.3*(3.2*3.75-1.25*1.6)
=42.3*(4*0.8*3.75-1.25*4*0.4)
=42.3*(4*0.4*2*3.75-1.25*4*0.4)
=42.3*(4x0.4x7.5-1.25x4x0.4)
=42.3*[4*0.4*(7.5-1.25)]
=42.3*[4*0.4*6.25]
=42.3*(4*2.5)
=4237
1.8+18÷1.5-0.5*0.3
=1.8+12-0.15
=13.8-0.15
=13.65
6.5*8+3.5*8-47
=52+28-47
=80-47
(80-9.8)*5分之2-1.32
=70.2X2/5-1.32
=28.08-1.32
=26.76
8*7分之4÷[1÷（3.2-2.95）]
=8*4/7÷[1÷0.25]
=8*4/7÷4
=8/7
2700*(506-499)÷900
=2700*7÷900
=18900÷900
=21
33.02-(148.4-90.85)÷2.5
=33.02-57.55÷2.5
=33.02-23.02
=10
(1÷1-1)÷5.1
=(1-1)÷5.1
=0÷5.1
=0
18.1+(3-0.299÷0.23)*1
=18.1+1.7*1
=18.1+1.7
=19.8
3.42*5.7+4.3*3.42 8.75*11-8.75 7.42*20.1
5.9*2.7+0.59*73
延伸阅读：
求小学四年级数学上册口算题377道640÷80= 15*5= 23*3= 12*2*5= 480÷80= 16*5= 27*3= 90÷15= 48÷4= 640÷16= 39÷3= 24*20= 32*3= 48÷16= 12*8= 27*3= 56÷14= 24÷8= 14*2= 83-45= 560÷80= 96÷24= 4...
四年级上册口算题大全带答案1000道640÷80=815*5= 7523*3=6912*2*5= 120480÷80=616*5=8027*3= 8190÷15= 648÷4= 12640÷16= 4039÷3= 1324*20= 48032*3= 9648÷16= 312*8= 9627*3= 8156÷14= 424÷8= 314*...
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小学五年级上册分数乘除法500道没有重复的口算题17*40= 100-63= 3.2+1.68= 2.8*0.4= 14-7.4= 1.92÷0.04= 0.32*500= 0.65+4.35= 10-5.4= 4÷20= 3.5*200= 1.5-0.06= 0.75÷15= 0.4*0.8= 4*0.25= 0.36+1.54= 1.01*99= 420...
四年级上册口算题640÷80= 15*5= 23*3= 12*2*5= 480÷80= 16*5= 27*3= 90÷15= 48÷4= 640÷16= 39÷3= 24*20= 32*3= 48÷16= 12*8= 27*3= 56÷14= 24÷8= 14*2= 83-45= 560÷80= 96÷24= 4...
小学六年级上册奥数题及答案要有答案20道题目小学六年级上册奥数题二个相邻的正方形，其中一条边在同一直线上，直线长度为20分米，现已知大正方形的面积比小正方形的面积多40平方分米，问：大、小正方形的边长各是多少？把两个正方形的两条边对齐，重叠后...
小学六年级上册奥数题及答案要有50道1. X和y是自然数，规定小x*y=4X-3y，如果5*a=8，那么a是几？ a=(4*5-8)/3 =4 2. 某班一次集合，请假人数是出席人数的1/9，中途又有一人请假离开，这样一来请假人是出席人数的3/22，那么这个...
求800道小学五年级上册口算题小数(1)6.7 * 10 = (2)8.7 * 40 = (3)1.2 * 50 = (4)4.9 * 500 = (5)5.7 * 50 = (6)8.5 * 20 = (7)0.8 * 60 = (8)1.7 * 60 = (9)8.2 * 500 = (10)5 * 60 = (11)5.7 * 90 = (12)...
急需小学三年级上册的数学口算题越多越好50*2= 80*5= 200*8= 850-650= 80+140= 4*100= 3000*6= 23*4= 860-600= 20*9= 30*9= 500*8= 40÷6= 23*3= 200*4= 7*5+6= 42+36= 28+0= 31-29= 32÷7= 40*5= 8*90= 34*2= 110...
