五年級下冊數學簡便計算題100道要有答案

2021-07-26 13:11:28 字數 7197 閱讀 9934

1樓:小拿說動漫

五年級下冊數學題,分數簡便計算,你知道答案嗎?

2樓:匿名使用者

止65885+35456794

3樓:匿名使用者

x/2+x/3+x/4=65

(6x+4x+3x)/12=65

13x/12=65

x=65x12/13=60

4樓:匿名使用者

56.8+43.2=100

5樓:樂觀的冰萱

5.4除於1.8加240乘1.5

等於3加240乘1.5

等於3加360

等於363

6樓:高材生

一、口算下面各題

10-2.65= 0.9×0.08= 528-349= 6+14.4= 24÷0.04=

12.34-2.3= 0÷3.8= 0.77+0.33= 7÷1.4= 67.5+0.25=7.2÷8×4= 5-1.4-1.6=

00÷125÷8= 1.9×4×0.5=

80×0.125= 3× = 6 6= 2 -( + )= 10 2=

3.2×7÷3.2×7= ( - )×12= 187.7×11-187.7= 1- 62.5%=

二、寫出下列每題在簡便運算時所運用的定律或性質

4 +3.2+5 +6.8 25×(8×0.4)×1.25 7 -(2 - )

( + + )×72 93.5÷3 16÷2.5

720÷16÷5 630÷42 456-(256-36)

102×35 98×42 158+262+138 375+219+381+225

5001-247-1021-232 (181+2564)+2719 378+44+114+242+222

276+228+353+219 (375+1034)+(966+125) (2130+783+270)+1017

99+999+9999+99999 7755-(2187+755) 2214+638+286

3065-738-1065 899+344 2357-183-317-357

2365-1086-214 497-299 2370+1995

7樓:在古運河仰望星空的啟明星

)(0.5+x)+x=9.8÷2

(2)2(x+x+0.5)=9.8

(3)25000+x=6x

(4)3200=440+5x+x

(5)x-0.8x=6

(6)12x-8x=4.8

(7) 7.5+2x=15

(8)1.2x=81.6

(7)x+5.6=9.4

(10)x-0.7x=3.6

(11)91÷x=1.3

(12) x+8.3=10.7

(13) 15x=3

(14) 3x-8=16

(15) 3x+9=27

(16) 18(x-2)=270

(17) 12x=300-4x

(18) 7x+5.3=7.4

(19) 3x÷5=4.8

(25) 0.5x+8=43

(26) 6x-3x=18

(27) 7(6.5+x)=87.5

(28) 0.273÷x=0.35

(29) 1.8x=0.972

(30) x÷0.756=90

(31) 0.1(x+6)=3.3×0.4(32) (27.5-3.5)÷x=4

(33) 9x-40=5

(34) x÷5+9=21

(35) 48-27+5x=31

(36) 10.5+x+21=56

(37) x+2x+18=78

(38) (200-x)÷5=30

(39) (x-140)÷70=4

(40) 20-9x=2

(41) x+19.8=25.8

(42) 5.6x=33.6

(43) 9.8-x=3.8

(44) 75.6÷x=12.6

(45) 5x+12.5=32.3

(46) 5(x+8)=102

(47) x+3x+10=70

(48) 3(x+3)=50-x+3

(49) 5x+15=60

(50) 3.5-5x=2

(51) 0.3×7+4x=12.5

(52) x÷1.5-1.25=0.75

(53) 4x-1.3×6=2.6

(54) 6x+12.8=15.8

(55) 150×2+3x=690

(56) 2x-20=4

(57) 3x+6=18

(58) 2(2.8+x)=10.4

(59) (x-3)÷2=7.5

(60) 13.2x+9x=33.3

(61) 3x=x+100

(62) x+4.8=7.2

(63) 6x+18=48

(64)3(x+2.1)=10.5

(65)12x-9x=8.7

(66)13(x+5)=169

(67) 2x-97=34.2

(68)3.4x-48=26.8

(69)42x+25x=134

(70)1.5(x+1.6)=3.6

(71)2(x-3)=5.8

(72)65x+7=137

(73) 9x+4×2.5=91

(74) 4.2 x+2.5x=134

(75) 10.5x+6.5x=51

(76) 89x-43x=9.2

(77) 5x-45=100

(78) 1.2x-0.5x=6.3

(79) 23.4=2x

(80) 4x-x=48.6

(81) 4.5x-x=28

(82)x-5.7=2.15

(83)5x-2x=18

(84)3x+0.7=7

(85) 3.5×2= 4.2+x

(86) 26×1.5= 2x+10

(87) 0.5×16―16×0.2=4x(88) 13 9.25-x=0.403

(89) 18.9÷x=0. 3

(90) 23x=14x+27

(91) x+14x=75

(92)95-5x=80

(93)1.8 +6x=54

(94) 6.7x-60.3=6.7

(95) 9+4x=53

(96) 2x+8=16

(97) 20x-14x=24

五年級下冊數學簡便演算法帶答案

8樓:瀛洲煙雨

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+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

9樓:巨集哥

0.25×1.25×32

=(0.25×4)×(1.25×8)

=1×10=10

10樓:歐璟衛思山

簡便計算題:

1)6.9+4.8+3.1

0.456+6.22+3.78

2)4.02+5.4+0.98

5.17-1.8-3.2

13.75-(3.75—6.48)

3)3.68+7.56-2.68

7.85+2.34-0.85+4.66

35.6-1.8-15.6-7.2

4)3.82+2.9+0.18+9.1

9.6+4.8-3.6

7.14-0.53-2.47

5)5.27+2.86-0.66+1.6313.35-4.68+2.65

6)47.8-7.45+8.8

0.398+0.36+3.64

15.75+3.59-0.59+14.257)66.86-8.66-1.34

0.25×16.2×4

(1.25-0.125)×8

8)3.6×102

3.72×3.5+6.28×3.5

36.8-3.9-6.1

9)28.6×101-28.6

4.8×7.8+78×0.52

32+4.9-0.9

10)4.8×100.1

56.5×9.9+56.5

7.09×10.8-0.8×7.09

11)25.48-(9.4-0.52)

4.2÷3.5

320÷1.25÷8

12)18.76×9.9+18.76

3.52÷2.5÷0.4

3.9-4.1+6.1-5.9

13)5.6÷3.5

9.6÷0.8÷0.4

4.2×99+4.2

14)17.8÷(1.78×4)

0.49÷1.4

1.25×2.5×32

15)15.2÷0.25÷4

146.5-(23+46.5)

16)3.83×4.56+3.83×5.444.36×12.5×8

9.7×99+9.7

17)27.5×3.7-7.5×3.7

8.54÷2.5÷0.4

0.65×101

18)(45.9-32.7)÷8÷0.1253.14×0.68+31.4×0.032

5.6÷1.25÷0.8÷2.5÷0.4

19)7.2×0.2+2.4×1.4

7.74×(2.8-1.3)+1.5×2.2620)3.9×2.7+3.9×7.3

18-1.8÷0.125÷0.8

12.7×9.9+1.27

21)21×(9.3-3.7)-5.6

15.02-6.8-1.02

5.4×11-5.4

22)2.3×16+2.3×23+2.3

9.43-(6.28-1.57)

3.65×4.7-36.5×0.37

23)46×57+23×86

13.7×0.25-3.7÷4

2.22×9.9+6.66×6.7

24)101×0.87-0.91×87

10.7×16.1-15.1×10.7

0.79×199

25)4.8+8.63+5.2+0.37

5.93+0.19+2.81

1.76+0.195+3.24

26)2.35+1.713+0.287+7.651.57+0.245+7.43

6.02+3.6+1.98

27)0.134+2.66+0.866

1.27+3.9+0.73+16.1

7.5+4.9-6.5

28)3.07-0.38-1.62

1.29+3.7+2.71+6.3

8-2.45-1.55

29)3.25+1.79-0.59+1.7523.4-0.8-13.4-7.2

0.32×403

30)3.2+0.36+4.8+1.64

1.23+3.4-0.23+6.6

0.25×36

31)12.7-(3.7+0.84)

36.54-1.76-4.54

0.25×0.73×4

32)7.6×0.8+0.2×7.6

0.85×199

0.25×8.5×4

33)1.28×8.6+0.72×8.6

12.5×0.96×0.8

10.4-9.6×0.35

34)0.8×(4.3×1.25)

3.12+3.12×99

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