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简便计算及答案五年级,小学五年级奥数题简便计算

  • 五年级
  • 2023-09-07

简便计算及答案五年级?528-99 =528-(100-1)=528-100+1 =428+1 =429 4、1.2×2.5+0.8×2.5 解析:运用提取公因数的方法,公式:ac+ab=a(b+c),提取公因数2.5,1.2和0.8相加正好凑整数,使得运算简便。那么,简便计算及答案五年级?一起来了解一下吧。

(1)2.5×32×0.125

=(2.5×4)×(8×0.125)

=10×1

=10

(2)3.5-7+6.5

=3.5+6.5-7

=3

(3)1.2×2.5+0.8×2.5

=2.5(1.2+0.8)

=25

(4)8.9×1.25-0.9×1.25

=1.25×(8.9-0.9)

=10

(迟团5)12.5×7.4×0.8

=12.5×0.8×7.4

=74

(6)6.5×9.5+6.5×0.5

=6.5×(9.5+0.5)

=6.5×10

=65

(春亩7)0.35×1.6+0.35×3.4

=0.35×(1.6+3.4)

=0.35×5

=1.75

(8)6.72-3.28-1.72

=6.75-(3.28+1.72)

=6.75-5

=1.75

(9)0.45+6.37+4.55

=0.45+4.55+6.37

=5+6.37

=11.37

(10)28×12.5-12.5×20

=(28-20)×12.5

=8×12.5

=100

(11)23.65-(3.07+3.65)

=23.65-3.65-3.07

=20-3.07

=16.93

(12)(4+0.4×0.25)×8×7×1.25

=(4+1)×7×(8×1.25)

=5×7×10

=350

(13)1.65×99+1.65

=1.65×(99+1)

=1.65×100

=165

(14)27.85-(7.85+3.4)扒旦森

=27.85-7.85+3.4

=20+3.4

=23.4

(15)7.8×9.9+0.78

=7.8×(9.9+0.1)

=7.8×10

=78

(16)4.8×46+4.8×54

=(46+54)×4.8

=100×4.8

=480

(17)673-327-173

=673-(327+173)

=673-500

=173

(18)4.44×2.5

=1.11×(4×2.5)

=1.11×10

=11.1

(19)3.5÷1.4

=(3.5÷0.7)÷(1.4÷0.7)

=5÷2

=2.5

(20)1+2+3+4+5+……+99+100

=(1+100)×100÷2

=101×100÷2

=1010÷2

=5050

简算题五年级带答案

(1)2.5×32×0.125

=(2.5×4)×(8×0.125)

=10×1

=10

(2)3.5-7+6.5

=3.5+6.5-7

=3

(3)1.2×2.5+0.8×2.5

=2.5(1.2+0.8)

=25

(4)8.9×1.25-0.9×1.25

=1.25×(8.9-0.9)

=10

(5)12.5×7.4×0.8

=12.5×0.8×7.4

=74

(6)6.5×9.5+6.5×0.5

=6.5×(9.5+0.5)

=6.5×10

=65

(7)0.35×1.6+0.35×3.4

=0.35×(1.6+3.4)

=0.35×5

=1.75

(8)6.72-3.28-1.72

=6.75-(3.28+1.72)

=6.75-5

=1.75

(9)0.45+6.37+4.55

=0.45+4.55+6.37

=5+6.37

=11.37

(10)28×12.5-12.5×20

=(28-20)×12.5

=8×12.5

=100

(11)23.65-(3.07+3.65)

=23.65-3.65-3.07

=20-3.07

=16.93

(12)(4+0.4×0.25)×8×7×1.25

=(4+1)×7×(8×1.25)

=5×7×10

=350

(13)1.65×99+1.65

=1.65×(99+1)

=1.65×100

=165

(14)27.85-(7.85+3.4)

=27.85-7.85+3.4

=20+3.4

=23.4

(15)7.8×9.9+0.78

=7.8×(9.9+0.1)

=7.8×10

=78

(16)4.8×46+4.8×54

=(46+54)×4.8

=100×4.8

=480

(17)673-327-173

=673-(327+173)

=673-500

=173

(18)4.44×2.5

=1.11×(4×2.5)

=1.11×10

=11.1

(19)3.5÷1.4

=(3.5÷0.7)÷(1.4÷0.7)

=5÷2

=2.5

(20)1+2+3+4+5+……+99+100

=(1+100)×100÷2

=101×100÷2

=1010÷2

=5050

编辑于 2017-08-03

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第3题2.5后没写乘号或加号。

五年级下册数学简便算法带答案

例1、5.76+13.67+4.24+6.33

=(5.76+4.24)+(13.67+6.33)

=10+10

=20

例2、37.24+23.79-17.24

=37.24-17.24+23.79

=20+23.79

=43.79

例3、 4×3.78×0.25

=4×0.25×3.78

=1×3.78

=3.78

例4、 125×246×0.8

=125×0.8×246

=100×246

=24600

例5、(2.5+12.5)×40

=2.5×40+12.5×40

=100+500

=600

例6、3.68×4.79+6.32×4.79

=(3.68+6.32)×4.79

=10×4.79

=47.9

例7. 26.86×25.66-16.86×25.66

=(26.86-16.86) ×25.66

=10×25.66

=256.6

例8、 5.7×99+5.7

= 5.7×(99+1)

=5.7×100

=570

例9、34×9.9

=34×(10-0.1)

=34×10-34×0.1

=340-3.4

=336.6

例10、 57×101

=57×(100+1)

=57×100+57×1

=5757

例11、7.8×1.1

=7.8×(1+0.1)

=7.8×1+7.8×0.1

=7.8+0.78

=8.58

例纳轿12、25×32

=25×4×8

=100×8

=800

例13、125×0.72

=125×8×0.09

=1000×0.09

=90

例14、87×2/85

=(85+2) ×2/85

=85×2/85+2×2/85

=2+4/85

=2又4/85

例15、56.5-3.7-6.3

=56.5-(3.7+洞辩6.3)

=56.5-10

=46.5

例16、32.6÷0.4÷2.5

=32.6÷(0.4×2.5)

=32.6÷1

=32.6

例16、86.7×0.356+1.33×3.56

=8.67×3.56+1.33×3.56

=(8.67+1.33)×3.56

=10×3.56

=35.6

例17、15.6÷4-5.6×1/4

=15.6×1/4-5.6×1/4

=(15.6-5.6)×1/4

=10×1/4

=2又1/2

例18、16/23×27+16×19/23

=27/23×16+16×19/23

=16×(27/23+19/23)

=16×2例1、5.76+13.67+4.24+6.33

=(5.76+4.24)+(13.67+6.33)

=10+10

=20

例2、37.24+23.79-17.24

=37.24-17.24+23.79

=20+23.79

=43.79

例3、 4×3.78×0.25

=4×0.25×3.78

=1×3.78

=3.78

例4、 125×246×0.8

=125×0.8×246

=100×246

=24600

例5、(2.5+12.5)×40

=2.5×40+12.5×40

=100+500

=600

例6、3.68×4.79+6.32×4.79

=(3.68+6.32)×4.79

=10×4.79

=47.9

例7. 26.86×25.66-16.86×25.66

=(26.86-16.86) ×25.66

=10×25.66

=256.6

例8、 5.7×99+5.7

= 5.7×(99+1)

=5.7×100

=570

例9、34×9.9

=34×(10-0.1)

=34×10-34×0.1

=340-3.4

=336.6

例10、 57×101

=57×(100+1)

=57×100+57×1

=5757

例11、7.8×1.1

=7.8×(1+0.1)

=7.8×1+7.8×0.1

=7.8+0.78

=8.58

例12、25×32

=25×4×8

=100×8

=800

例13、125×0.72

=125×8×0.09

=1000×0.09

=90

例14、87×2/85

=(85+2) ×2/85

=85×2/85+2×2/85

=2+4/85

=2又4/85

例15、56.5-3.7-6.3

=56.5-(3.7+6.3)

=56.5-10

=46.5

例16、32.6÷0.4÷2.5

=32.6÷(0.4×2.5)

=32.6÷1

=32.6

例16、86.7×0.356+1.33×3.56

=8.67×3.56+纳茄缺1.33×3.56

=(8.67+1.33)×3.56

=10×3.56

=35.6

例17、15.6÷4-5.6×1/4

=15.6×1/4-5.6×1/4

=(15.6-5.6)×1/4

=10×1/4

=2又1/2

例18、16/23×27+16×19/23

=27/23×16+16×19/23

=16×(27/23+19/23)

=16×2

=32

小学五年级的简便运算 难一点的! 比较难一些的,急! 最好是带答案的!

答:有什么问题吗

答:看看我能不能解决

问:解方程的基本性质是什么

答:含有未知数的等式叫方程等式的基本性质仔伍1:等式两边同时加〔或减〕同一个数或同一个代数式,所得的结果仍是等式用字母表示为:若a=b,c为一模则个数或一个代数式.则:〔1〕a+c=b+c〔2〕a-c=b-c等式的基本性质2:等式的两边同时乘或除以同一个不为0的的数所得的结果仍是等式3若a=b,则b=a(等式的对称性)4若a=b,b=c则a=c(等式的传递性)方程:含有未知数的等式叫做方程方程的使方程左右两边相等的未知数的值叫做方程的解解方程:求方程的解的过程叫做解方程移项:把方程中的某些项改变符号后,从方程的一边移到念码或另一边,这种变形叫做移项,根据是等式的基本性质1

五年级下册数学简便算法带答案

五年级的简便运算例子83×18-18×13+18×20

解题思路:四则运算规则嫌凯旦(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:

83×18-18×13+18×20

=(83-13+20)×18

=90×18

=1620

扩展资料$竖式计算-计算结果:先将两乘数末位对齐,然后分别使用第二个乘数,由末位起对每一芹扰孙锋位数依次乘上一个乘数,最后将所计算结果累加即为乘积,如果乘数为小数可先将其扩大相应的倍数,最后乘积在缩小相应的倍数;

解题过程:

步骤一:8×90=720

步骤二:1×90=900

根据以上计算结果相加为1620

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以上就是简便计算及答案五年级的全部内容,1、8+98+998+9998+99998 分析:这五个加数分别接近10、100、1000、10000、100000。在计算这类题目时,常使用整减法,例如将8转化为(10-2)。

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