簡便運算大全及答案,簡便計算100道及答案

時間 2021-08-30 10:17:29

1樓:匿名使用者

一、運用加法結合律進行簡算:

(a+b)+c=a+(b+c) 或a+b+c+d=(a+c)+(b+d)

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

二、運用乘法結合律進行簡算:

這種題型往往含特殊數字之間相乘

(a×b)×c=a×(b×c)

特殊數字之間相乘:

25×4=100   125×8=1000  25×8=200  125×4=500

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

三、利用乘法分配律進行簡算:

(a+b)×c=a×c+ b×c

(a-b)×c=a×c- b×c

做這種題,一定不要急著去算,先要分析各數字之間的特殊關係,找到做題的竅門。

例5、(2.5+12.5)×40

=2.5×40+12.5×40

=100+500

=600

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

2樓:瀛洲煙雨

常見以下幾類題型:

一、運用加法結合律進行簡算

(a+b)+c=a+(b+c) 或a+b+c+d=(a+c)+(b+d)

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

二、運用乘法結合律進行簡算:這種題型往往含特殊數字之間相乘

(a×b)×c=a×(b×c)

特殊數字之間相乘:

25×4=100 125×8=1000 25×8=200 125×4=500

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

2.5×0.125×8×4等,如果遇到除法同樣適用,或將除法變為乘法來計算。如:8.3×67÷8.3÷6.7等。

三、利用乘法分配律進行簡算:

(a+b)×c=a×c+ b×c

(a-b)×c=a×c- b×c

做這種題,一定不要急著去算,先要分析各數字之間的特殊關係。也就是先要仔細觀察,找到做題的竅門。

例5、(2.5+12.5)×40

=2.5×40+12.5×40

=100+500

=600

3樓:

(1+1)×2 =1×2+1×2 =4

4樓:翔亡233中通快遞查詢

13.67+6.33應該等於20,他上面是10

5樓:

8.3x(6.3+3.7)

=8.3x10=83

簡便計算100道及答案

6樓:匿名使用者

300÷125÷8

=300÷(125×8)

=300÷1000

=0.3

396-96-172-28

=(396-96)-(172+28)

= 300-200

= 100

125*24

= 125*8*3

= 1000*3

= 3000

360÷24

=360÷6÷4

=60÷4

=15240÷48

=240÷24÷2

=10÷2

=5800÷32

=800÷8÷4

=100÷4

=2527+456+73

=(27+73)+456

=100+456

=556

24÷4+56÷4

=(24+56)÷4

=80÷4

=202.5×0.7×0.8

=(2.5×0.8)×0.7

=60×0.7

=42其它還有一些題目如下:

27+456+73

10-0.4-2.6

0.43+8.6+0.57

244+182+156

14.02-3.5-6.5

2.78+19+199

912-163-237

7樓:隔壁小陶噢

6.5×(5+5)

=6.5×10

=650.4×125×25×0.8

=(0.4×25)×(125×0.8)

=10×100=1000

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.

78.3×(6.3+3.7)

=8.3×10

=831.24+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

=2133.02-(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

=018.1+(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 0.358×14.7+35.8×0.853

2.7×3.014 0.847×35 0.079×0.23望採納。❤️❤️❤️

8樓:綱寄鬆

125×(40-4)

9樓:

外0+2+2+2.22狗屎。

10樓:奶糖悅悅

解決了不會出題的困擾

11樓:乾皖禕

100道不是乘法的簡便方法

12樓:life鳳凰于飛

25x32x125

=(25x4)x(8x125)

=100x1000

=100000

13樓:海鹽芝士

我覺得可以,請你們不要罵他了,出題也不容易。

14樓:卯德海

88x125

=(80+8)ⅹ125

=80╳125+8x125

=10000十100

=11000

17x99+17x1

=17x(99+1)

=17x100

=1700

3000÷125÷8

=3000÷(125╳8)

=3000÷1000=3

15樓:新野旁觀者

0.4×125×25×0.8

=(0.4×25)×(125×0.8)

=10×100=1000

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.

78.3×(6.3+3.7)

=8.3×10

=831.24+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

=2133.02-(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

=018.1+(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 0.358×14.7+35.8×0.853

2.7×3.014 0.847×35 0.079×0.23

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