计算下面各题31.5×24.50.8×
(1)125×24,=125×8×3,=1000×3,=3000;(2)210×21=4410;(3)50×240=12000;(4)199×40,=(200-1)×40,=200×40-1×40,=8000-40,=7960.
472+503
=472+500+3
=972+3
=975
143+(57+26)
=143+57+26
=200+26
=226
78-46-14
=78-(46+14)
=78-60
=18
32×125
=4×8×125
=4×(8×125)
=4×1000
=4000
3×125×8
=3×(125×8)
=3×1000
=3000
47+51+49+53
=(47+53)+(51+49)
=100+100
=200
99+(38+101)
=99+101+38
=200+38
=238
125×64
=125×8×8
=1000×8
=8000
500-99-1-98-2
=500-(99+1+98+2)
=500-200
=300
340+498
=340+500-2
=840-2
=838
436-99
=436-100+1
=336+1
=337
25×24
=25×4×6
=100×6
=600
65+(178+35)
=65+35+178
=100+178
=278
288-199
=288-200+1
=188+1
=189
850-246-54
=850-(246+54)
=850-300
=550
567-104
=567-100-4
=467-4
=463
260÷13÷2
=260÷(13×2)
=260÷26
=10
18×45
=45×2×9
=90×9
=810
101+202+303
=(100+200+300)+(1+2+3)
=600+6
=606
373-(173+40)
=373-173-40
=200-40
160
8×23×5
=8×5×23
=40×23
=920
720÷16÷5
=720÷(16×5)
=720÷80
=9
125×15×8×6
=(125×8)×(15×6)
=1000×90
=90000
25×32×125
=25×4×8×125
=(25×4)×(8×125)
=100×1000
=100000
125×(6×8)
=125×8×6
=1000×6
=6000
25×(4×12)×5
=(25×4)×(12×5)
=100×60
=6000
45×16
=45×2×8
=90×8
=720
898-133-67
=898-(133+67)
=898-200
=698
360÷8÷5
=360÷(8×5)
=360÷40
=9
(363+95)+(37+105)
=(363+37)+(95+105)
=400+200
=600
630÷35
=630÷7÷5
=90÷5
=18
560÷14
=560÷7÷2
=80÷2
=40
630÷42
=630÷7÷6
=90÷6
=15
25×(13×4)
=25×4×13
=100×13
=1300
35×14
=35×2×7
=70×7
=490
500÷25÷4
=500÷(25×4)
=500÷100
=5
101+202+303
=(100+200+300)+(1+2+3)
=600+6
=606
15×(9×4)
=15×4×9
=60×9
=540
999+99+9
=1000+100+10-3
=1110-3
=1107
567-(139+267)
=567-267-139
=300-139
=161
脱式计算。
408-12×24 (46+28)×60 42×50-1715÷5
32+105÷5 (108+47)×52 420×(327-238)
(4121+2389)÷7 671×15-974 469×12+1492
405×(3213-3189) 5000-56×23 125×(97-81)
6942+480÷3 304×32-154 20+80÷4-20=
100÷(32-30)×0= 25×4-12×5=
70×〔(42-42)÷18〕= 75×65+75×35=
用简便方法计算下面各题
1、89+124+11+26+48 2、875-147-23
3.25×125×40×8 4、147×8+8×53
5、125×64 6、0.9+1.08+0.92+0.1
用简便方法计算
①89+124+11+26+48 ②875-147-23
③147×8+8×53 ④125×64
计算下面各题.
1.280+840÷24×5 2.85×(95-1440÷24)
3.58870÷(105+20×2) 4.80400-(4300+870÷15)
5.1437×27+27×563 6.81432÷(13×52+78)
7.125×(33-1) 8.37.4-(8.6+7.24-6.6)
计算。(1∶1)
(1)156×107-7729 (2)37.85-(7.85+6.4)
(3)287×5+96990÷318 (4)1554÷[(72-58)×3]
脱式计算
2800÷ 100+789 (947-599)+76×64
1.36×(913-276÷23) 2.(93+25×21)×9
3.507÷13×63+498 4.723-(521+504)÷25
5.384÷12+23×371 6.(39-21)×(396÷6)
(1)156×[(17.7-7.2)÷3] (2)[37.85-(7.85+6.4)] ×30
(3)28×(5+969.9÷318) (4)81÷[(72-54)×9]
57×12-560÷35 848-640÷16×12
960÷(1500-32×45) [192-(54+38)]×67
138×25×4 (13×125)×(3×8) (12+24+80)×50 704×25 25×32×125 32×(25+125)
178×101-178 84×36+64×84 75×99+2×75 83×102-83×2 98×199
123×18-123×3+85×123 50×(34×4)×3 25×(24+16) 178×99+178
79×42+79+79×57 7300÷25÷4 8100÷4÷75 75×27+19×2 5 31×870+13×310
4×(25×65+25×28) 138×25×4 (13×125)×(3×8) (12+24+80)×50
25×32×125 32×(25+125) 102×76 58×98
178×101-178 84×36+64×84 75×99+2×75 83×102-83×2
98×199 123×18-123×3+85×123 50×(34×4)×3 25×(24+16)
178×99+178 79×42+79+79×57 7300÷25÷4 8100÷4÷75
请采纳答案,支持我一下。
0.8×0.56=0.448
4.23×0.028=0.11844
0.63×1.05=0.6615
36×0.56=0.2016
0.32×0.2=0.064
以下三题得数保留两位小数
35.6×0.506≈18.01
6.728×3.2≈21.53
34.3×0.23≈0.79
计算下面各题31.5×24.50.8×
31.5×24.5=771.750.8×0.56=0.4484.23×0.028=0.118440.63×1.05=0.661536×0.56=0.20160.32×0.2=0.064以下三题得数保留两位小数35.6×0.506≈18.016.728×3.2≈21.5334.3×0.23≈0.79
计算各题,能简算的要简算。 (1)31.5-18.54\/1.8 (2)1.82\/(0.13*0.7...
1、原式=31.5-(18+0.54)\/1.8=31.5-10-0.3=21.2 2、原式=14\/0.7=20 3、原式=2.7×(3.85-19.5)=2.7×(-15.65)=-42.255 4、原式=9-5+2.81=4+2.81=6.81
用简便方法计算下面各题20.23×31.5+2.023×317+202.3×3.68?_百度...
=20.23×31.5+2.023×10×31.7+20.23×10×3.68 =20.23×31.5+20.23×31.7+20.23×36.8 =20.23×(31.5+31.7+36.8)=20.23×100 =2023
计算各题,能简算的要简算。 (1)31.5-18.54\/1.8 (2)1.82\/(0.13*0.7...
5.81
31.5-1.5÷0.24最简便的方法?
递等式计算31.5-1.5÷0.24 解题思路:四则运算规则(按顺序计算,先算乘除后算加减,有括号先算括号,有乘方先算乘方)即脱式运算(递等式计算)需在该原则前提下进行 解题过程:31.5-1.5÷0.24 =31.5-6.25 =25.25 存疑请追问,满意请采纳 ...
列竖式计算题31.50.45
经济数学团队为你解答,满意请采纳!
用商的变化规律计算下面各题的题630÷20?
630÷20=63÷2=31.5
用竖式计算下面各题. 3.68×2.7= 100.45÷49=
3.68×2.7=9.936; 100.45÷49=2.05; 31.5÷0.36=87.5;
用简便方法计算下面各题(2)20.2331.5+2.023 317+202.3 3.68?_百度...
20.23*31.5+2.023*317+202.3*3.68 =20.23*(31.5+31.7+36.8) 应用乘法分配律简便运算 =20.23*100=2023
竖式计算31点5÷3点九等于多少?
竖式步骤解析31.5÷3.9 解题思路:将被除数从高位起的每一位数进行除数运算,每次计算得到的商保留,余数加下一位数进行运算,依此顺序将被除数所以位数运算完毕,得到的商按顺序组合,余数为最后一次运算结果 解题过程:步骤一:因为除数不为整数,首先将除数化为整数为39,被除数同时扩大同样的倍数为:315 步骤...
宁乐君佳:[答案] 31.5*24.5=771.75 0.8*0.56=0.448 4.23*0.028=0.11844 0.63*1.05=0.6615 36*0.56=0.2016 0.32*0.2=0.064 以下三题得数保留两位小数 35.6*0.506≈18.01 6.728*3.2≈21.53 34.3*0.23≈0.79
上街区17226963985: 计算下面各题31.5*24.50.8* - ?
宁乐君佳: 31.5*24.5=771.75 0.8*0.56=0.448 4.23*0.028=0.11844 0.63*1.05=0.6615 36*0.56=0.2016 0.32*0.2=0.064 以下三题得数保留两位小数 35.6*0.506≈18.01 6.728*3.2≈21.53 34.3*0.23≈0.79
上街区17226963985: 计算下面各题,能简算的要简算.9.5*1.06 - 2.52÷2.43.4*0.26+0.74*3.4 1.25*32*0.87.09*99+7.0968.5+31.5÷(0.29+0.41)0.4*5÷0.4*5. - ?
宁乐君佳:[答案] (1)9.5*1.06-2.52÷2.4 =10.07-1.05 =9.02; (2)3.4*0.26+0.74*3.4 =3.4*(0.26+0.74) =3.4*1 =3.4; (3)1.25*32*0.8 =(1.25*0.8)*32 =1*32 =32; (4)7.09*99+7.09 =7.09*(99+1) =7.09*100 =709; (5)68.5+31.5÷(0.29+0.41) =68.5+31.5÷0.7 =68.5+45 =113.5; (6)...
上街区17226963985: 用商的变化规律计算下面各题的题630÷20? - ?
宁乐君佳: 630÷20=63÷2=31.5
上街区17226963985: 小学数学用拖式计算下面各题?
宁乐君佳: 15X1.5X1.4=22.5*1.4 =31.50.25X6.43X40=0.25*40*6.43 =10*6.43 =64.357X0.89 =50.73
上街区17226963985: 求五年级50道脱式计算题,要答案 - ?
宁乐君佳: 脱式计算. 408-12*24 (46+28)*60 42*50-1715÷5 32+105÷5 (108+47)*52 420*(327-238) (4121+2389)÷7 671*15-974 469*12+1492 405*(3213-3189) 5000-56*23 12...
上街区17226963985: 用竖式计算下面各题. 3.68*2.7= 100.45÷49= - ?
宁乐君佳: 3.68*2.7=9.936;100.45÷49=2.05;31.5÷0.36=87.5;
上街区17226963985: 计算下面各题,能简算的要简算.9.5*1.06 - 2.52÷2.43.4*0.26+0.74*3.4 1.25*32*0.87.09*99+7.0968. - ?
宁乐君佳: (1)9.5*1.06-2.52÷2.4=10.07-1.05=9.02;(2)3.4*0.26+0.74*3.4 =3.4*(0.26+0.74)=3.4*1=3.4;(3)1.25*32*0.8=(1.25*0.8)*32=1*32=32;(4)7.09*99+7.09=7.09*(99+1)=7.09*100=709;(5)68.5+31.5÷(0.29+0.41)=68.5+31.5÷0.7=68.5+45=113.5;(6)0.4*5÷0.4*5=2÷0.4*5=5*5=25.
上街区17226963985: 小学数学小数除整数法练习题,除数最好是单数. - ?
宁乐君佳: 0.2*0.5 0.27-0.2 0.8*0.7 4.5*3 1.5*0.4 0.05*1.6 2.5÷5 16÷4 4.8÷8 0.15*4 4.9÷7 8.1÷9 一、复习旧知1.根据算式写两个除法算式. 1.75*18=31.5 ( ) ( )2.列竖式计算.25.2÷6 34.5÷15 13.08÷24 根据以上三题,你发现商的小数点要与( )的小数...
上街区17226963985: 10道简单小数除法练习题及答案 - ?
宁乐君佳: 0.4/8=0.05 6/1.2=5 6.3/0.2=31.5 4.2/3=14 22.4/4=5.6 1.2/3=0.4 0.48/6=0.08 4.6/23=0.2 6.8/4=1.7 0.72/12=0.06