50道計算題及答案,50道計算題帶答案過程

2021-12-23 20:15:10 字數 8043 閱讀 4989

1樓:新野旁觀者

1.6+7+8+9+…+48

=(6+48)×( 48-6+1)÷2

=1161

2.1-2+3-4+5-…-2008+2009

=2009-2008+2007-2006+…+5-4+3-2+1

=(2009-2008)+(2007-2006)+…+(5-4)+(3-2)+1

=1×(2009-1)÷2+1=1005

3.1+2+3-4+5+6+7-8+9+…+85+86+87-88

=(1+2+3-4)+(5+6+7-8)+9+…+(85+86+87-88)

=2+10+18+…+170

=(2+170)×(88÷4)÷2

=172×11

=1892

4.1988-1985+1982-1979+…+8-5+2

=(1988-1985)+(1982-1979)+…+(8-5)+2

=3×[(1988-5)÷3+1]÷2+2

=3×331+2

=995

5.1999-1996+1993-1990+…-10+7-4+1

=(1999-1996)+(1993-1990)+…-10+(7-4)+1

=3×[(1999-4)÷3+1]÷2+1

=3×333+1

=1000

6.1999×19981997-1997×19981999

=1999×(19980000+1997)-1997×(19980000+1999)

=1999×19980000+1999×1997-[1997×19980000+1997×1999]

=1999×19980000+1999×1997-1997×19980000-1997×1999

=(1999-1997)×19980000

=39960000

7.1035-998

8.5076+99

9.3008+449

10.428×25×4

11.328-189-28

12.43.2-(3.2-1.28)

13.25×2×1.25×4×5×8

14.84×0.25+16÷4

15.5731-(731-525)=5731-731-525

=5000-525

=4475

2樓:

50道二次根式的乘除乘乘除的數學題

50道計算題帶答案過程 5

3樓:敏晏

789換個號苦發個7

4樓:新野旁觀者

408-12×24 = 408 - 288 = 120

(46+28)×60 = 74 x 60 = 4440

42×50-17 = 2100- 17 = 2083

32+105÷5 = 32 + 21 = 53

420×(327-238) = 420 x 89 = 37380

(4121+2389)÷7 = 6510 ÷7 = 930

3.416÷(0.016×35) = 3.416 ÷0.56 = 6.1

0.8×[(10-6.76)÷1.2] = 0.8 x(3.24÷1.2) = 0.8 x 2.7 = 2.16

5.67×0.2-0.62 = 1.134-0.62 = 0.514

0.4×0.7×0.25 = 0.4 x 0.25 x 0.7 = 0.1 x 0.7 = 0.07

0.78+5.436+1 = 6.216 +1 = 7.216

30.8÷[14-(9.85+1.07)] = 30.8 ÷ (14 - 10.92) = 30.8÷3.08 = 10

[60-(9.5+28.9)]÷0.18 = (60- 38.4)÷0.18 = 21.6 ÷0.18 = 120

2.881÷0.43-0.24×3.5 = 6.7 - 0.24 x3.5 = 6.7 - 0.84 = 5.86

20×[(2.44-1.8)÷0.

4+0.15] = 20x (0.64 ÷0.

4 +0.15)= 20x(1.6 +0.

15) = 20 x1.75 = 35

28-(3.4+1.25×2.4) = 28 - (3.4 + 3) = 28 - 6.4 = 21.6

2.55×7.1+2.45×7.1 = (2.55 + 2.45) x7.1 = 5 x7.1=35.5

0.8×〔15.5-(3.21+5.79)〕 = 0.8 x (15.5 - 9) = 0.8 x 6.5 = 5.2

(31.8+3.2×4)÷5 = (31.8 + 12.8)÷5 = 44.6÷5 = 8.92

31.5×4÷(6+3) = 126 ÷ 9 = 14

2÷2.5+2.5÷2 = 0.8 + 1.25 =2.05

194-64.8÷1.8×0.9 = 194 -36 x0.9 = 194-32.4 = 161.6

5180-705×6 = 5180 - 4230=950

24÷2.4-2.5×0.8 =10 -2=8

405×(3213-3189) =405x24 = 9720

125×(97-81) =125x16 =2000

6942+480÷3 = 6942 + 160 = 6782

20+80÷4-20 = 20 + 20 -20 = 40 -20 = 20

100÷(32-30)×0 = 100 ÷2 x0= 50 x0 = 0

25×4-12×5 = 100 - 60 = 40

70×〔(42-42)÷18〕=70 x (0÷18) = 70x0 = 0

75×65+75×35 = 75 x (65 +35) = 75x100 = 7500

6-1.6÷4= 6- 0.4 = 5.6

5.38+7.85-5.37= 13.23 - 5.37=7.86

7.2÷0.8-1.2×5=9 - 6 =3

6-1.19×3-0.43= 6-3.57 - 0.43 = 6- (3.57 + 0.43) = 6-4 = 2

6.5×(4.8-1.2×4)= 6.5 x(4.8 - 4.8 )=6.5 x0 = 0

0.68×1.9+0.32×1.9 = (0.68 + 0.32) x1.9 = 1 x 1.9 = 1.9

10.15-10.75×0.

4-5.7 = 10.15 - 4.

3 - 5.7 = 10.15 -(4.

3 + 5.7)=10.15 - 10 =0.

155.8×(3.87-0.

13)+4.2×3.74 = 5.

8 x 3.74 +4.2 x 3.

74 = (5.8 +4.2)x3.

74 = 10 x 3.74 = 37.4

32.52-(6+9.728÷3.

2)×2.5 = 32.52 - (6+3.

04)x2.5 = 32.52 - 9.

02 x 2.5 = 32.52 -22.

55 = 9.97

(136+64)×(65-345÷23)= 200x(65-15) = 200x 50=10000

(48+370)÷(64-45)=418 ÷19 =22

14 × 8/7 – 5/6 × 12/15 =16 - 2/3 = 15x1/3

17/32 – 3/4 × 9/24 = 17/32 - 27/96= 51/96 - 27 /96 = 24/96 = 1/4

3 × 2/9 + 1/3 = 2/3 + 1/3 = 1

5/7 × 3/25 + 3/7 =3/35 + 3/7= 3/35 +15/35= 18/35

1/5 × 2/3 + 5/6 = 2/15 + 5/6 = 4/30 + 25/30 = 29/30

9/22 + 1/11 ÷ 1/2 = 9/22+ 1/11 x 2 = 9/22 +2/11 = 9/22 +4/22 = 13/22

5/3 × 11/5 + 4/3 = 11/3 +4/3 = 15/3 = 5

45 × 2/3 + 1/3 × 15 = 30+5 = 35

7/19 + 12/19 × 5/6 =7/19 + 10/19=17/19

1/4 + 3/4 ÷ 2/3 =1/4+ 1/2 = 1/4 + 2/4 = 3/4

8/7 × 21/16 + 1/2= 3/2+1/2 = 2

50道五年級脫式計算題帶過程和答案,有答案和過程的加分,謝謝了。 15

5樓:匿名使用者

50道五年級脫式計算題帶過

6樓:匿名使用者

下次自己做題,我可不幫你了!

0.4×125×25×0.8

=(0.4×25)×e68a84e8a2ad62616964757a686964616f31333433616234(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

32×125×25

=4×8×125×25

=(4×25)×(8×125)

=100×1000

=100000

9000÷72×(1.25×0.7×8)

=9000÷72×7

=125×7

=875

1.25×(8+10)

=1.25×8+1.25×10

=10+12.5

=22.5

1.24+0.78+8.76

=(1.24+8.76)+0.78

=10+0.78

=10.78

1/2-(4/5-1/2)

=1/2+1/2-4/5

=1-4/5

=1/5

4800÷25÷4

=4800÷(25x4)

=4800÷100

=4800÷100

=482/5-(3/8-3/5)

=2/5+3/5-3/8

=1-3/8

=5/8

3/4-(3/7-1/4)

=3/4+1/4-3/7

=1-3/7

=4/7

3.2x0.125x2.5

=0.125x8x(0.4x2.5)

=1x1

=1 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.

7=8.3×(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

32×125×25

=4×8×125×25

=(4×25)×(8×125)

=100×1000

=100000

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=33

3.7x2.56-2.3

=9.472-2.3

=7.172

1.24+0.78+8.76

=(1.24+8.76)+0.78

=10+0.78

=10.78

1/2-(4/5-1/2)

=1/2+1/2-4/5=1-4/5

=1/5

4800÷25÷4

=4800÷(25x4)

=4800÷100

=482/5-(3/8-3/5)

=2/5+3/5-3/8

=1-3/8

=5/8

3/4-(3/7-1/4)

=3/4+1/4-3/7

=1-3/7

=4/7

3.2x0.125x2.5

=0.125x8x(0.4x2.5)

=1x1

=10.4×125×25×0.8

=(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

61-(1.25+2.5×0.7)

=61-3

=58[(10-0.8)+9.85]-2÷0.125=19.05-2÷0.125

=19.05-16

=3.05

408-12×24

=408-288

=120

(46+28)×60

=74x60

= 4440

42×50-17

= 2100-17

= 2083

32+105÷5

=32+21

= 53

420×(327-238)

= 420x89

= 37380

(4121+2389)÷7

=6510÷7

= 930

3.416÷(0.016×35)

= 3.416 ÷0.56

= 6.1

0.8×[(10-6.76)÷1.2]

= 0.8 x(3.24÷1.2)

= 0.8 x 2.7

= 2.16

5.67×0.2-0.62

= 1.134-0.62

= 0.514

0.4×0.7×0.25

=0.4x0.25x0.7

=0.1×0.7

= 0.07

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