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六年级(上册)分数解方程练习试题25% + 10x = x - 15%x = 68xx121 5x3 x126x5 =13.4 3x=x= xx= 4x6=2 x= x = x = x = 4x3 9 = 29 x + x = 4x21=4 6x5 =13.4 x-x= 46385x= x= x=x=12 x= x=x= x-0.25= =30% 4+0.7x=102 x+x=42 x+x=105 x-x=400 x-0.125x=8 = x+x=18 x( + )= x0.375x= x+=4 xx12 5 x2.4580.365- x = (x- 4.5) = 7 x- 25%x = 10x- 0.8x = 16+6 20 x 8.5= 1.5 x- x -4= 21 x25%x=90 xx= 解:(1)(123/4122/3)x8/3 (98)x8/3 17x8/3 x8/317 x8/51 ( 2)7x/153/44/159/17 7x/159/85 x9/857/15 x27/119 (3)(151/3152/5)x20 (56)x20 11x20 x2011 x20/11 (4) 2x3x/76 11x/76 x611/7360(126)5 288(2614)8 5006-(502-80) (10512635)25 864(2723)12 (453816)24 500(240386) 64(8742) 15 (845153)1612(4928)7 450(8448 )12 (58+37)(64-95) 95(64-45) 178-14556+42 812-700(9+3111) 85+14(14+20826) (284+16)(512-820818) 120-36418+35 (58+37)(64-95) (6.8-6.80.55)8.5 0.12 4.80.124.8 (3.21.5+2.5)1.6 6-1.64= 5.38+7.85-5.37= 7.20.8-1.25= 6-1.193-0.43= 6.5(4.8-1.24)= 5.8(3.87-0.13)+4.23.74 32.52-(6+9.7283.2)2.5 (7.1-5.6)0.9-1.15 2.5 5.42.6(3.7-2.9)+0.62 126(12-7.2)-6 1267.2-6 0.681.9+0.321.9 (58+370)(64-45) 420+580-642128 (136+64)(65-34523) 48.10.15-10.750.4-5.7 388+(5000-1000) 158+262+138 375+219+381+225 50012471021232 (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 30657381065 899+344 2357183317357 23651086214 497299 2370+1995 3999+498 1883398 1225 7524 138254 (13125)(38) (12+24+80)50 70425 2532125 32(25+125) 88125 10276 5898 178101178 8436+6484 7599+275 83102832 98199 123181233+85123 50(344)3 25(24+16) 17899+178 7942+79+7957 7300254 8100475 16800120 301002100 32000400 49700700 124824 315015 480025 2356(1356721) 1235(17801665) 7527+192 5 31870+13310 4(2565+2528) (181+2564)+2719 378+44+114+242+222 276+228+353+219 (375+1034)+(966+125) (2130+783+270)+1017 99+999+9999+99755(2187+755) 2214+638+286 30657381065 899+344 2357183317357 23651086214 497299 2370+1995 3999+498 1883398 1225 7524 138254 (13125)(38) (12+24+80)50 70425 2532125 32(25+125) 88125 10276 5898 178101178 8436+6484 7599+275 83102832 98199 123181233+85123 50(344)3 25(24+16) 17899+178 7942+79+7957 7300254 8100475 16800120 301002100 32000400 49700700 124824 315015 480025 21500125 2356(1356721) 1235(17801665) 7527+1925 31870+13310 4(2565+2528)1 2x+3(9-x)=21 2x+3*9-3x=21 27-x=21 x=27-21 x=62. (1-25%)x=72 75%x=72 x=7275% x=963. x-40%x=3.6 (1-40%)x=3.6 x=3.660% x=66. 2-1417411 =2-1128411 =1072x+3x=605x=60x=123.6x-2.8x=120.8x=12x=15100x-x=19899x=198x=218x+2x=60(问题里弄成+60了 是等号吧?)20x=60x=35x+6x=12.111x=12.1x=1.16.6x-5x=81.6x=8x=54x-x=243x=24x=81.5x-x=10.5x=1x=21.9x+0.4x=9.22.3x=9.2x=425x-5x=1020-52020x=100x=580x-40=(30x+40)280x-40=60x+8020x=120x=680x-3200=60x+120020x=4400x=2201.50.061.44 0.75150.05, 0.40.80.32, 4203512, 2512300, 1350.5270 3/4 + 1/4 =1, 3 - 2/3 =7/3, 3/4 - 1/2= 1/4 1/6 + 1/2 -1/6 =1/2, 7.5-(2.5+3.8)=1.2, 7/8 + 3/8 =5/4 3/10 +1/5 =1/2, 4/5 - 7/10 =1/10, 2 - 1/6 -1/3 =1.5 0.51170.03, 32.81951.8, 5.21.34, 1.60.4 0.64 4.90.73.43, 150.2, 6120.5, 0.870.490.38 14 / 14
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