小學五年級簡算題,小學五年級簡便計算題

時間 2021-10-26 10:12:25

1樓:匿名使用者

1題:原式=1/3-1/4+1/4-1/5+1/5-···+1/98-1/99

=1/3-1/99

=32/99

2題:原式=1.2*30*1.09+1.2×67.3=1.2×(67.3+32.7)

=1.2*100

=120

3題:原式=1.8*40*2.09-1.8*73.6=1.8*(83.6-73.6)

=1.8*10

=184題:原式=4*1.7*8*2.1*19.3*8*4*0.1=4*8*(1.7*2.1+19.3*0.1)=32*5

=160

5題:原式=1.2*40*1.08+1.2×56.8=1.2*(43.2+56.8)

=1.2*100

=120

6題:原式=0.9999×0.

7+0.1111*9*0.3=0.

9999*0.7+0.9999*0.

3=0.9999*(0.7+0.

3)=0.9999

解釋:1題.經過嘗試可發現:1/(3*4)=1/3-1/4,之後所有的都以此類推就ok了。

2到6:思路都一樣,找到一個最小公約數,之後把這個數提出來,括號裡面多半是10、100這樣的數,ok了。

2樓:匿名使用者

(1) __1___ __ 1 _____ ……___1___3×4 4×5 98×99

1/(3*4)=(1/3)-(1/4)

1/(4*5)=(1/4)-(1/5)

………………

1/(98*99)=(1/98)-(1/99)原式=1/3-1/4+1/4-1/5+1/5-1/6+……+1/98-1/99

=1/3-1/99

=32/99

(2) 36×1.09+1.2×67.3

=1.2*20*1.09+1.2*67.3=1.2*(21.8+67.3)

=1.2*89.1

=106.92

(3) 72×2.09-1.8×73.6

=1.8*40*2.09-1.8*73.6=1.8*(83.6-73.6)

=180

6.8×16.8+19.3×3.2

=(10-3.2)*16.8+19.3*3.2=168-16.8*3.2+19.3*3.2=168+(19.3-16.8)*3.2

=168+2.5*3.2

=168+8=176

48×1.08+1.2×56.8

=1.2*40*1.08+1.2*56.8=1.2*(43.2+56.8)

=120

0.9999×0.7+0.

1111×2.7=(1.111-0.

1111)*0.7+0.1111*2.

7=7.777-0.1111*(2.

7-0.7)=7.777-0.

2222

=7.5548

3樓:青青的柳葉

1題:原式=1/3-1/4+1/4-1/5+1/5-···+1/98-1/99

=1/3-1/99

=32/99

2題:原式=1.2*30*1.09+1.2×67.3=1.2×(67.3+32.7)

=1.2*100

=120

3題:原式=1.8*40*2.09-1.8*73.6=1.8*(83.6-73.6)

=1.8*10

=184題:原式=4*1.7*8*2.1*19.3*8*4*0.1=4*8*(1.7*2.1+19.3*0.1)=32*5

=160

5題:原式=1.2*40*1.08+1.2×56.8=1.2*(43.2+56.8)

=1.2*100

=120

6題:原式=0.9999×0.

7+0.1111*9*0.3=0.

9999*0.7+0.9999*0.

3=0.9999*(0.7+0.

3)=0.9999

小學五年級簡便計算題

4樓:娉婷嫻媛

簡便運算

3.2×

2.5×0.125

74.9÷ 0.25÷ 4

2.5×0.37× 0.04

3.68×7.8+2.2×3.68

3.8×0.6+62×0.06 4.7×9.9+0.4724.98—(1.36+1.98)

4.69×10.1

3.2×2.5×0.125

74.9÷ 0.25÷ 4

2.5×0.37× 0.04

3.68×7.8+2.2×3.68

3.8×0.6+62×0.06 4.7×9.9+0.4724.98—(1.36+1.98)

4.69×10.1

祝你學習進步,天天開心,採納吧!

5樓:亓韞卜樂蕊

1.(25×4)+(25×6)

2.5×7×10×6

=25×(4+6)

=(5×6)×(7×10)

=25×10

=30×70

=250

=210

6樓:卷展祝水丹

懶蛋!你要答案,我偏不給你了!

7樓:戎曼凡申從

再給你一點,網上多的是五年級數學簡便計算練習卷下面各題怎樣算簡便就怎樣算。

6.9+4.8+3.1

0.456+6.22+3.78

15.89+(6.75-5.89)

4.02+5.4+0.98

5.17-1.8-3.2

13.75-(3.75+6.48)

3.68+7.56-2.68

7.85+2.34-0.85+4.66

35.6-1.8-15.6-7.2

3.82+2.9+0.18+9.1

9.6+4.8-3.6

7.14-0.53-2.47

5.27+2.86-0.66+1.63

13.35-4.68+2.65

73.8-1.64-13.8-5.36

47.8-7.45+8.8

0.398+0.36+3.64

15.75+3.59-0.59+14.2566.86-8.66-1.34

0.25×16.2×4

(1.25-0.125)×8

3.6×102

3.72×3.5+6.28×3.5

36.8-3.9-6.1

15.6×13.1-15.6-15.6×2.14.8×7.8+78×0.52

32+4.9-0.9

4.8×100.1

56.5×9.9+56.5

7.09×10.8-0.8×7.09

25.48-(9.4-0.52)

4.2÷3.5

320÷1.25÷8

18.76×9.9+18.76

3.52÷2.5÷0.4

3.9-4.1+6.1-5.9

5.6÷3.5

9.6÷0.8÷0.4

4.2×99+4.2

17.8÷(1.78×4)

0.49÷1.4

1.25×2.5×32

3.65×10.1

15.2÷0.25÷4

0.89×100.1

146.5-(23+46.5)

3.83×4.56+3.83×5.44

4.36×12.5×8

9.7×99+9.7

27.5×3.7-7.5×3.7

8.54÷2.5÷0.4

0.65×101

3.2×0.25×12.5

(45.9-32.7)÷8÷0.125

3.14×0.68+31.4×0.032

5.6÷1.25÷0.8÷2.5÷0.4

7.2×0.2+2.4×1.4

8.9×1.01

7.74×(2.8-1.3)+1.5×2.263.9×2.7+3.9×7.3

18-1.8÷0.125÷0.8

12.7×9.9+1.27

21×(9.3-3.7)-5.6

15.02-6.8-1.02

5.4×11-5.4

2.3×16+2.3×23+2.3

9.43-(6.28-1.57)

3.65×4.7-36.5×0.37

46×57+23×86

13.7×0.25-3.7÷4

2.22×9.9+6.66×6.7

101×0.87-0.91×87

10.7×16.1-15.1×10.7

0.79×199

4.8+8.63+5.2+0.37

5.93+0.19+2.81

1.76+0.195+3.24

2.35+1.713+0.287+7.651.57+0.245+7.43

6.02+3.6+1.98

0.134+2.66+0.866

1.27+3.9+0.73+16.1

7.5+4.9-6.5

3.07-0.38-1.62

1.29+3.7+2.71+6.3

8-2.45-1.55

3.25+1.79-0.59+1.75

23.4-0.8-13.4-7.2

0.32×403

3.2+0.36+4.8+1.64

1.23+3.4-0.23+6.6

0.25×36

12.7-(3.7+0.84)

36.54-1.76-4.54

0.25×0.73×4

7.6×0.8+0.2×7.6

0.85×199

0.25×8.5×4

1.28×8.6+0.72×8.6

12.5×0.96×0.8

10.4-9.6×0.35

0.8×(4.3×1.25)

3.12+3.12×99

28.6×101-28.6

0.86×15.7-0.86×14.7

2.4×102

2.31×1.2×0.5

14-7.32-2.68

2.64+8.67+7.36+11.33

70÷28

(2.5-0.25)×0.4

9.16×1.5-0.5×9.16

3.6-3.6×0.5

63.4÷2.5÷0.4

4.9÷1.4

3.9÷(1.3×5)

(7.7+1.54)÷0.7

2.5×2.4

2.7÷45

15÷(0.15×0.4)

0.35×1.25×2×0.8

32.4×0.9+0.1×32.4

15÷0.25

4.5÷1.8

4.2÷3.5

930÷0.6÷5

8樓:潛翮淳于雅容

ppt#256,1,分數四則-乘除法-計算題

1、直接寫出得數。

0.45×2.5=

0.8×1.25=

0.3×3.6=

0.3×0.3=

10×0.07=

0.3×1.4=

0.05×7=

0.92×0.4=

0.2×0.26=

0.14×4=

0.02×0.1=

1.2×0.3=0.2×0.4=

8.2+1.8=

100-35.22=

2.3×4=

2.5×0.4=

2.4×5=

0.22×4=

3.25×0=

0.9-0.52=

3.99×1=

0×3.52=

12.5×8=

8÷10

=10-1.8-7.2=

0.43+3.57=

2.5×4×12=

0.9×0.8=

7.5x-3x

=a+3a+7a==

1.05×100=

1÷0.5=

0.96÷3=

1.47÷0.7=

5.4÷6=

0.16.5×10=

0.56×100=

3.78×100=

4÷0.8

=3.215×100=

0.8×10=

4.08×100=

1.1×0.2

=0.6×0.8

=3×0.9=

2.5×0.4=

3.6×0.4=

12.5×8=

50×0.04=

80×0.3

=1.1×9=

0.16×5

=1.78+2.2

=9.6÷0.6

=1.2×0.5-0.4

=0.7÷0.01

=2.5×0.4

=12-3.9=

1.25×8÷1.25

=6.6÷0.66

=5.37×0+4.63

=3.9+2.03=

4.2÷3.5=

1.6+2.4×0.3

=2.14-0.9=

27+456+73=

0.3×0.3=

7.2+2.8=

0.9÷0.01=

12÷0.3=

2.87÷0.7=

13÷4=

0.96÷0.3=

1.5×0.4=

7÷0.25=

2.5×0.7×0.8=

8-2.5=

16÷1.6=

5.6×1.01=

8×(2.5+0.25)=

0.36+0.64=

64.32÷16=

4.2÷0.1=

72.8÷0.8=

8.4÷4.2=

13.8+9.9=

2.4×2.5=

0.05×0.8=

2.56-0.37=

1.25×0.8×0.5=

12×2.5=

1.23×3=

3.2÷1.6=

3.5+3.5×3=

19.6÷2=

8.8÷2.2=

0.75×4=

(1.5+0.25)×4=

0.5×0.8=

8.4×0.2=

1.6×0.2=

7.2×0.3=

2.8×0.3=

0.9÷0.15=

1.8×0.4=

5.5÷0.55=

0.08×100=

2.2÷0.11=

5.46+4.54=

12.5×0.8=

0.35×0.3=

1.4×5=

2.8×4=

19.6÷4=

22.5×4=

2、用豎式計算

0.396÷1.2=

0.756÷0.36=

15.6×13=

0.18×15=

0.025×14=

3.06×36=

0.04×0.12=

3.84×2.6≈

5.76×3=

(保留一位小數)

7.15×22

90.75÷3.3

3.68×0.25

16.9÷0.13

1.55÷3.9

3.7×0.016

13.76×0.8=

5.2×0.6

8.4×1.3

6.4×0.5

4.48×0.4

5.25×5

35.4×4.2

0.042×0.54

0.76×0.32

0.25×0.046

2.52×3.4

1.08×25

0.12×0.5×0.16=

4.8×0.25=

0.125×1.4≈

(保留兩位小數)

2.5÷0.7=

(保留三位小數)

10.1÷3.3=

(商用迴圈小數)

10.75÷12.5=

(用乘法驗算)

3.25×9.04=

(用除法驗算)

3、脫式計算(能簡算的要簡算)

2.5×7.1×4

16.12×99+16.12

5.2×0.9+0.9

7.28×99+7.28

4.3×50×0.2

64-2.64×0.5

26×15.7+15.7×24

(2.275

+0.625)×0.28

3.94+34.3×0.2

1.2×(9.6÷2.4)÷4.8

8.9×1.1×4.7

2.7×5.4×3.9

3.6×9.85-5.46

8.05×3.4+7.6

6.58×4.5×0.9

2.8×0.5+1.58

32+4.9-0.9

4.8-4.8×0.5

(1.25-0.125)×8

4.8×100.1

56.5×99+56.5

7.09×10.8-0.8×7.09

4.85

+0.35

÷1.4

8.7×

17.4

-8.7

×7.4

12.5×0.4×2.5×8

0.87×3.16+4.64

9.5×101

0.68

÷(5.2

-3.5)×

1.25

40.5

÷0.81

×0.18

4.8×(15

÷2.4)

2.13.×0.×8257

6.81+6.81×99

0.25×185×40

4.4×0.8-3.4×0.8

(9.37+9.37+9.37+9.37)×2.54.2.×1.+1.×1.75

2.37×6.3+2.37×3.7

2.5×1.25×0.32

3.8×10.1

2.5×(3.8×0.04)

7.69×101

3.8×10.1

0.25×39+0.25

0.125×72

46×0.33+54×0.33

(8×5.27)

×1.25

6.81+6.81×99

0.25×185×40

6.8×0.75÷0.5

3.75÷0.125–2.75

1.53+23.4÷7.2

9.5×99

13.5×0.98

12.5×8.8

二、解方程:

54-x=24

7x=49

126÷x=42

13+a=28.5

2.4x=26.4

7.5x-3x=18

5×1.3-2x=5.5

24x+6x=63.6

5.6x+4.4x=5.2

三、列式計算

1、20減去0.8的差除以4個0.3的和,商是多少?

2、一個數的2.6倍加上9,和是35,求這個數。(用方程解)3、1.2與4的積,減去6.除以5的商,

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