四年级数学下册简便计算题1000道

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四年级数学下册简便计算题1000道

四年级数学下册简便计算题1000道

329×101

=329×100+329×1

=32900+329

=33229

9 × 37+9 ×63

=9×(37+63)

=9×100

=900

25 ×(20 + 4)

=25×20+25×4

=500+100

=600

45 × 7 + 55 × 7

=(45+55)×7

=100×7

=700

8 × 27 + 8 × 73

=8×(27+73)

=8×100

=800

504x25

=500×25+4×25

=12500+100

=12600

36×97-58×36+61×36

=36×(97-58+61)

=36×100 =3600

5000÷8÷125

=5000÷(8×125)

=5000÷1000

=5

25x(4+8)

=25×4+25×8

=100+200

=300

84x101

=84×100+84×1

=8400+84

=8484

四年级数学下册简便计算题

要题目呢 还是、、、、

四年级数学下册简便计算

可以用650来除以25乘2的积 也就是650除以50等于13

也可以先用650除以25等于26 在用26除以2等于13

望楼主采纳谢谢!

四年级数学下册简便计算题加答案 横式计算 速度求

1. 67 ×21 +18 ×21 + 85 ×79

2. 375 ×480 + 6250 ×48

3. 321 ×81 + 321 ×19

4. 222222 ×999999

5. 333333 ×333333

6. 654321 ×909090 +654321 ×90909

7. 34 ×3535 -35 ×3434

8. 345345 ÷15015

9. 75 ×45 + 17 ×25

10. (48 ×75 ×81)÷(24 ×25 ×27) 【答案详解】

1. 67 ×21 +18 ×21 + 85 ×79

=21×(67+18)+85×79

=21×85+85×79

=85×(21+79)

=8500

2. 375 ×480 + 6250 ×48

=480×(375+625)

=480000

3. 321 ×81 + 321 ×19

=321×(81+19)

=32100

4. 222222 ×999999

=222222×(1000000-1)

=222222000000-222222

=222221777778

5. 333333 ×333333

=111111×999999

=111111×(1000000-1)

=111111000000-111111

=111110888889

6. 654321 ×909090 +654321×90909

=654321×999999

=654321×(100000-1)

=654321000000-654321

=654320345679

7. 34 ×3535 -35 ×3434

=34×35×101-35×34×101

=0

8. 345345 ÷15015 =345×1001÷(15×1001)

=345÷15×1001÷1001

=23

9. 75 ×45 + 17 ×25

=25×3×45+17×25

=25×(135+17)

=25×152

=25×4×38

=3800

10. (48 ×75 ×81)÷(24 ×25 ×27)

=48÷24×75÷25×81÷27

=2×3×3

=18

希望能帮到你,望采纳,谢谢!

四年级数学简便计算题

类型一(减法性质)

公式:a-b-c = a-(b+c)

题目:

10-0.432 -2.568

9.3-5.26-2.74

13.4-(3.4+5.2)

14.9-(5.2+4.9)

18.32-5.47-4.32

17.29-5.28-6.29

类型二(乘法结合律)

公式:(aXb)Xc=aX(bXc)

题目:

25×6.8×0.04

0.25×32×0.125

6.4×1.25×12.5 类型三(乘法分配律)

公式:c×(a+b)=ca+cb

题目:

0.45×201

0.58×10.1

50.2×99

4.7×9.9

3.28X5.7+6.72X5.7

2.1×99+2.1

1.7×9.9+0.17

23×0.1+2.3×9.9

0.18+4.26-0.18+4.26

0.58X1.3÷0.58X1.3

7.3÷4+2.7X0.25

3.75X0.5-2.75÷2

5.26X0.125+2.74÷8

类型四(除法性质)

公式:a÷b÷c=a÷(b×c)

题目:

6.3÷1.8

4.2÷3.5

9.5÷(1.9 × 8)

12.8÷(0.4×1.6)

930÷0.6÷5

63.4÷2.5÷0.4

(7.7+1.54)÷0.7

(11.7+9.9)÷0.9

另还有加法交换律、结合律,乘法交换律相比是较容易的。

1.01×99= 420÷35= 25×12= 135÷0.5=

3/4 + 1/4 = 2 + 4/9 = 3 - 2/3 = 3/4 - 1/2= 1/6 + 1/2 -1/6 = 7.5-(2.5+3.8)= 7/8 + 3/8 =

3/10 +1/5 = 4/5 - 7/10 = 2 - 1/6 -1/3 =

0.51÷17= 32.8+19= 5.2÷1.3= 1.6×0.4=

4.9×0.7= 1÷5= 6÷12= 0.87-0.49=

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÷35= 25×12= 135÷0.5=

3/4 + 1/4 = 2 + 4/9 = 3 - 2/3 = 3/4 - 1/2=

1/6 + 1/2 -1/6 = 7.5-(2.5+3.8)= 7/8 + 3/8 =

3/10 +1/5 = 4/5 - 7/10 = 2 - 1/6 -1/3 =

0.51÷17= 32.8+19= 5.2÷1.3= 1.6×0.4=

4.9×0.7= 1÷5= 6÷12= 0.87-0.49=

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÷35= 25×12= 135÷0.5=

3/4 + 1/4 = 2 + 4/9 = 3 - 2/3 = 3/4 - 1/2=

1/6 + 1/2 -1/6 = 7.5-(2.5+3.8)= 7/8 + 3/8 =

3/10 +1/5 = 4/5 - 7/10 = 2 - 1/6 -1/3 =

0.51÷17= 32.8+19= 5.2÷1.3= 1.6×0.4=

4.9×0.7= 1÷5= 6÷12= 0.87-0.49=

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÷35= 25×12= 135÷0.5=

3/4 + 1/4 = 2 + 4/9 = 3 - 2/3 = 3/4 - 1/2= 1/6 + 1/2 -1/6 = 7.5-(2.5+3.8)= 7/8 + 3/8 =

3/10 +1/5 = 4/5 - 7/10 = 2 - 1/6 -1/3 =

0.51÷17= 32.8+19= 5.2÷1.3= 1.6×0.4=

4.9×0.7= 1÷5= 6÷12= 0.87-0.49=

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÷35= 25×12= 135÷0.5=

3/4 + 1/4 = 2 + 4/9 = 3 - 2/3 = 3/4 - 1/2=

1/6 + 1/2 -1/6 = 7.5-(2.5+3.8)= 7/8 + 3/8 =

3/10 +1/5 = 4/5 - 7/10 = 2 - 1/6 -1/3 =

0.51÷17= 32.8+19= 5.2÷1.3= 1.6×0.4=

4.9×0.7= 1÷5= 6÷12= 0.87-0.49=

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÷35= 25×12= 135÷0.5=

3/4 + 1/4 = 2 + 4/9 = 3 - 2/3 = 3/4 - 1/2=

1/6 + 1/2 -1/6 = 7.5-(2.5+3.8)= 7/8 + 3/8 =

3/10 +1/5 = 4/5 - 7/10 = 2 - 1/6 -1/3 =

0.51÷17= 32.8+19= 5.2÷1.3= 1.6×0.4=

4.9×0.7= 1÷5= 6÷12= 0.87-0.49=

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÷35= 25×12= 135÷0.5=

3/4 + 1/4 = 2 + 4/9 = 3 - 2/3 = 3/4 - 1/2=