20)1 60 0.75 46+3 4 55-

2020-11-22 14:31:05 字数 8507 阅读 5569

1楼:匿名用户

①(11/15-4/5+7/20)÷1/60=(11/15-4/5+7/20)×60

=44-48+21

=17②0.75×46+3/4×55-3÷4=3/4×(46+55-1)

=3/4×100

=7560%x-3=15

0.6x=18

6x=180

x=30

1/2(x+1.5)=6

x+1.5=12

x=12-1.5

x=10.5

1/2x+1/5x=2.8

5x+2x=28

7x=28x=4

2楼:匿名用户

0.6x-3+3=15+3

0.6x=18

0.6x÷0.6=18÷0.6

x=30

1/2(x+1.5)×2=6×2

x+1.5=12

x+1.5-1.5=12-1.5

x=10.5

1/2x+1/5x=2.8

(1/2+1/5)x=2.8

(0.5+0.2)x=2.8

0.7x=2.8

0.7x÷0.7=2.8÷0.7x=4

3楼:匿名用户

30 10.5 4

①15÷4分之5÷7分之8 ②25-5分之12÷25分之6 ③(5分之3+25分之4÷5分之2)×3分之1

4楼:lh我爱我家

解:①15÷4分之5÷7分之8

=15×4/5×7/8

=12×7/8

=21/2

②25-5分之12÷25分之6

=25-12/5×25/6

=25-2×5

=15③(5分之3+25分之4÷5分之2)×3分之1=(3/5+4/25×5/2)×1/3

=(3/5+2/5)×1/3

=1/3

④(5分之3-15分之2)÷(12分之1+6分之5)=7/15×12/11

=28/55

⑤17分之12÷3×5分之4

=4/17×4/5

=16/85

⑥[1-(4分之1+8分之3)]÷4分之1=(1-5/8)×4

=3/8×4

=3/2

⑦4分之13×4-4÷3分之四

=13-4×3/4

=13-3

=10⑧6分之5÷4分之3+6分之1÷4分之3=5/6×4/3+1/6×4/3

=(5/6+1/6)×4/3

=4/3

2-15/16÷5/7÷3/4 9/20÷[1/2×(2/5+4/5)] x-5/8x=1

5楼:咨询霍老师

2-15/16÷

5/7÷3/4

=2- 21/ 16 ÷3/4

=2- 7/4

=1/4 =0.25

9/20÷[1/2×(2/5+4/5)]

=9/20/[1/2×6/5]

=9/20×5/3

=3/4

x-5/8x=1/3×45

x-5/8x=15

3/8x=15

x=15÷8/3

x= 40

1/2x-1/3x+3/5x+2/5=5

1/6x +3/5x+2/5=5

23/30x+2/5=5

23/30x=5-2/5

23/30x=23/5

x=23/5 ÷23/30

x=60.8:4=x:8

0.8 ÷4=x ÷8

0.2=x ÷8

x=0.2×8

x=1.6

6楼:兖矿兴隆矿

2-15/16÷5/7÷3/4

=2-15/16*7/5*4/3

=2-7/4

=1/4

9/20÷[1/2×(2/5+4/5)]

=9/20/[1/2*6/5]

=9/20*5/3

=3/4

x-5/8x=1/3×45

3x/5=15

x=25

1/2x-1/3x+3/5x+2/5=5

(1/2-1/3+3/5)x=4.6

23x/30=4.6

x=6.9

0.8:4=x:8

4x=6.4

x=1.6

7楼:紫云千雪

1、2-15/16÷5/7÷3/4

=2-15/16*7/5*4/3

=2-7/4

=8/4-7/4

=1/4

2、9/20÷[1/2×(2/5+4/5)]=9/20/[1/2*6/5]

=9/20/3/5

=9/20*5/3

=3/4

3、x-5/8x=1/3×45

3/8x=15

x=15*8/3

x=40

4、1/2x-1/3x+3/5x+2/5=5(1/2-1/3+3/5)x=5-2/5

23/30x=23/5

x=65、0.8:4=x:8

4x=6.4

x=1.6

525÷(3+4)的简便计算

8楼:匿名用户

525÷(3+4)

=525÷7

=75谢谢,请采纳

9楼:匿名用户

3/4-3/5+4/5-4/6+5/6-5/7=1/2-1/2-1/2+1/2=1/100000+3-32/867=1+1/2-1/3=15265357163237515632536721653/10+1=67/68+34/35-23/24=89/90+123/124-234/235=1.125*3+125*5+25*3+252.9999*3+101*11*(101-92)3.

(23/4-3/4)*(3*6+2)4.3/7×49/9-4/35.8/9×15/36+1/276.

12×5/6–2/9×37.8×5/4+1/48.6÷3/8–3/8÷69.

4/7×5/9+3/7×5/910.5/2-(

3/2+4/5)11.7/8+(1/8+1/9)12.9×5/6+5/613.

3/4×8/9-1/314.7×5/49+3/1415.6×(1/2+2/3)16.

8×4/5+8×11/517.31×5/6–5/618.9/7-(2/7–10/21)19.

5/9×18–14×2/720.4/5×25/16+2/3×3/421.14×8/7–5/6×12/1522.

17/32–3/4×9/2423.3×2/9+1/324.5/7×3/25+3/725.

3/14××2/3+1/626.1/5×2/3+5/627.9/22+1/11÷1/228.

5/3×11/5+4/329.45×2/3+1/3×1530.7/19+12/19×5/631.

1/4+3/4÷2/332.8/7×21/16+1/233.101×1/5–1/5×2134.

50+160÷4035.120-144÷18+3536.347+45×2-4160÷5237(58+37)÷(64-9×5)38.

95÷(64-45)39.178-145÷5×6+4240.812-700÷(9+31×11)41.

85+14×(14+208÷26)43.120-36×4÷18+3544.(58+37)÷(64-9×5)45.

(6.8-6.8×0.

55)÷8.546.0.

12×4.8÷0.12×4.

847.(3.2×1.

5+2.5)÷1.648.

6-1.6÷4=5.38+7.

85-5.37=49.7.

2÷0.8-1.2×5=6-1.

19×3-0.43=50.6.

5×(4.8-1.2×4)=51.

5.8×(3.87-0.

13)+4.2×3.7452.

32.52-(6+9.728÷3.

2)×2.553.[(7.

1-5.6)×0.9-1.

15]÷2.554.5.

4÷[2.6×(3.7-2.

9)+0.62]55.12×6÷(12-7.

2)-656.12×6÷7.2-657.

0.68×1.9+0.

32×1.958.58+370)÷(64-45)59.

420+580-64×21÷2860.136+6×(65-345÷23)15-10.75×0.

4-5.762.18.

1+(3-0.299÷0.23)×163.

(6.8-6.8×0.

55)÷8.564.0.

12×4.8÷0.12×4.

865.(3.2×1.

5+2.5)÷1.666.

3.2×6+(1.5+2.

5)÷1.667.0.

68×1.9+0.32×1.

968.10.15-10.

75×0.4-5.769.

5.8×(3.87-0.

13)+4.2×3.7470.

32.52-(6+9.728÷3.

2)×2.571.[(7.

1-5.6)×0.9-1.

15]÷2.572.5.

4÷[2.6×(3.7-2.

9)+0.62]73.12×6÷(12-7.

2)-674.12×6÷7.2-675.

33.02-(148.4-90.

85)÷2.51)76.(25%-695%-12%)*3677.

/4*3/5+3/4*2/578.1-1/4+8/9/7/979.+1/6/3/24+2/2180.

/15*3/581.3/4/9/10-1/682./3+1/2)/5/6-1/3]/1/783.

/5+3/5/2+3/484.(2-2/3/1/2)]*2/585.+5268.

32-256986.3+456-52*887.5%+632588.

/2+1/3+1/42)89+456-783)5%+.3/7×49/9-4/34)9×15/36+1/275)2×5/6–2/9×36)3×5/4+1/47)94÷3/8–3/8÷68)95/7×5/9+3/7×5/99)6/2-(3/2+4/5)10)8+(1/8+1/9)11)8×5/6+5/612)1/4×8/9-1/313)10×5/49+3/1414)1.5×(1/2+2/3)15)2/9×4/5+8×11/516)3.

1×5/6–5/617)4/7-(2/7–10/21)18)19×18–14×2/719)5×25/16+2/3×3/420)4×8/7–5/6×12/1521)7/32–3/4×9/2422)1、2/3÷1/2-1/4×2/52、2-6/13÷9/26-2/33、2/9+1/2÷4/5+3/84、10÷5/9+1/6×45、1/2×2/5+9/10÷9/206、5/9×3/10+2/7÷2/57、1/2+1/4×4/5-1/88、3/4×5/7×4/3-1/29、23-8/9×1/27÷1/2710、8×5/6+2/5÷411、1/2+3/4×5/12×4/512、8/9×3/4-3/8÷3/413、5/8÷5/4+3/23÷9/1123)1.2×2.5+0.

8×2.524)8.9×1.

25-0.9×1.2525)12.

5×7.4×0.826)9.

9×6.4-(2.5+0.

24)(27)6.5×9.5+6.

5×0.50.35×1.

6+0.35×3.40.

25×8.6×46.72-3.

28-1.720.45+6.

37+4.555.4+6.

9×3-(25-2.5)2×41846-620-3804.8×46+4.

8×540.8+0.8×2.

51.25×3.6×8×2.

5-12.5×2.428×12.

5-12.5×2023.65-(3.

07+3.65)(4+0.4×0.

25)8×7×1.251.65×99+1.

6527.85-(7.85+3.

4)48×1.25+50×1.25×0.

2×87.8×9.9+0.

78(1010+309+4+681+6)×123×9146×782×6×8545.15×7/8+6.1-0.

606251.3/7×49/9-4/32.8/9×15/36+1/273.

12×5/6–2/9×34.8×5/4+1/45.6÷3/8–3/8÷66.

4/7×5/9+3/7×5/97.5/2-(3/2+4/5)8.7/8+(1/8+1/9)9.

9×5/6+5/610.3/4×8/9-1/311.7×5/49+3/1412.

6×(1/2+2/3)13.8×4/5+8×11/514.31×5/6–5/615.

9/7-(2/7–10/21)16.5/9×18–14×2/717.4/5×25/16+2/3×3/418.

14×8/7–5/6×12/1519.17/32–3/4×9/2420.3×2/9+1/321.

5/7×3/25+3/722.3/14×2/3+1/623.1/5×2/3+5/624.

9/22+1/11÷1/225.5/3×11/5+4/326.45×2/3+1/3×1527.

7/19+12/19×5/628.1/4+3/4÷2/329.8/7×21/16+1/230.

101×1/5–1/5×2131.50+160÷40(58+370)÷(64-45)32.120-144÷18+3533.

347+45×2-4160÷5234(58+37)÷(64-9×5)35.95÷(64-45)36.178-145÷5×6+42420+580-64×21÷2837.

812-700÷(9+31×11)(136+64)×(65-345÷23)38.85+14×(14+208÷26)39.(284+16)×(512-8208÷18)40.

120-36×4÷18+3541.(58+37)÷(64-9×5)42.(6.

8-6.8×0.55)÷8.

543.0.12×4.

8÷0.12×4.844.

(3.2×1.5+2.

5)÷1.6(2)3.2×(1.

5+2.5)÷1.645.

6-1.6÷4=5.38+7.

85-5.37=46.7.

2÷0.8-1.2×5=6-1.

19×3-0.43=47.6.

5×(4.8-1.2×4)=0.

68×1.9+0.32×1.

948.10.15-10.

75×0.4-5.749.

5.8×(3.87-0.

13)+4.2×3.7450.

32.52-(6+9.728÷3.

2)×2.551.[(7.

1-5.6)×0.9-1.

15]÷2.552.5.

4÷[2.6×(3.7-2.

9)+0.62]53.12×6÷(12-7.

2)-6(4)12×6÷7.2-6102×4.57.

8×6.9+2.2×6.

95.6×0.258×(20-1.

25)1)127+352+73+44(2)89+276+135+33(1)25+71+75+29+88(2)243+89+111+579405-2940÷28×21920-1680÷40÷7690+47×52-398148+3328÷64-75360×24÷32+7302100-94+48×5451+(2304-2042)×234215+(4361-716)÷81(247+18)×27÷2536-720÷(360÷18)1080÷(63-54)×80(528+912)×5-61788528÷41×38-904264+318-8280÷69(174+209)×26-9000814-(278+322)÷151406+735×9÷453168-7828÷38+504796-5040÷(630÷7)285+(3000-372)÷361+5/6-19/123x(-9)+7x(-9(-54)x1/6x(-1/3)1.18.1+(3-0.

299÷0.23)×12.(6.

8-6.8×0.55)÷8.

53.0.12×4.

8÷0.12×4.84.

(3.2×1.5+2.

5)÷1.6(2)3.2×(1.

5+2.5)÷1.65.

6-1.6÷4=5.38+7.

85-5.37=6.7.

2÷0.8-1.2×5=6-1.

19×3-0.43=7.6.

5×(4.8-1.2×4)=0.

68×1.9+0.32×1.

98.10.15-10.

75×0.4-5.79.

5.8×(3.87-0.

13)+4.2×3.7410.

32.52-(6+9.728÷3.

2)×2.511.[(7.

1-5.6)×0.9-1.

15]÷2.512.5.

4÷[2.6×(3.7-2.

9)+0.62]13.12×6÷(12-7.

2)-614.12×6÷7.2-615.

33.02-(148.4-90.

85)÷2.5