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