1、数学练习题1. 3/7 49/9 - 4/3 2. 8/9 15/36 + 1/27 3. 12 5/6 2/9 3 4. 8 5/4 + 1/4 5. 6 3/8 3/8 6 6. 4/7 5/9 + 3/7 5/9 7. 5/2 -( 3/2 + 4/5 ) 8. 7/8 + ( 1/8 + 1/9 ) 9. 9 5/6 + 5/6 10. 3/4 8/9 - 1/3 11. 7 5/49 + 3/14 12. 6 ( 1/2 + 2/3 ) 13. 8 4/5 + 8 11/5 14. 31 5/6 5/6 15. 9/7 - ( 2/7 10/21 ) 16. 5/9 18 14 2/
2、7 17. 4/5 25/16 + 2/3 3/4 18. 14 8/7 5/6 12/15 19. 17/32 3/4 9/24 20. 3 2/9 + 1/3 21. 5/7 3/25 + 3/7 22. 3/14 2/3 + 1/6 23. 1/5 2/3 + 5/6 24. 9/22 + 1/11 1/2 25. 5/3 11/5 + 4/3 26. 45 2/3 + 1/3 15 27. 7/19 + 12/19 5/6 28. 1/4 + 3/4 2/3 29. 8/7 21/16 + 1/2 30. 101 1/5 1/5 21 1.口算下面各题 (1)58+42= (2)874
3、5= (3)1258= (4)5012= (5)8044= (6)13466= (7)100098= (8)7205= (9)047= 2.先填写下面各题的运算顺序,再计算出得数。 (1)168+3636+32= (2)153514+83= (3)505505= 4.用简便方法计算: (1)3786499 (2)3225125 (3)1653338662 (4)7987+350+2013+450 (5)3838+6238 (6)452+99452 (7)20179 (8)5012548 5.计算下面各题: (1)340(120408) (2)45(720195719) (3)86+4500+(
4、208836)2 (4)39674(4875151321) (5)1054(174168)8 (6)6048(10799)9 脱式计算。 4081224 (4628)60 425017155 321055 (10847)52 420(327238) (4121+2389)7 67115-974 46912+1492 405(3213-3189) 5000-5623 125(97-81) 6942+4803 30432-154 20+804-20 100(32-30)0 254-125 70(42-42)18 7565+7535 用简便方法计算下面各题 1、89+124+11+26+48 2、8
5、75-147-23 325125408 4、1478+853 5、12564 6、0.91.080.920.1 用简便方法计算 1 89+124+11+26+48 875-147-23 2 1478+853 3 12564 计算下面各题 1280840245 285(95144024) 358870(105202) 480400(430087015) 514372727563 681432(135278) 7125(331) 837.4(8.67.246.6) 计算。 (1)156107-7729 (2)37.85-(7.85+6.4) (3)2875+96990318 (4)1554(72-
6、58)3 脱式计算 2800 100789 (947599)7664 136(91327623) 2(932521)9 35071363498 4723(521504)25 53841223371 6(3921)(3966) (1)156(17.7-7.2)3 (2)37.85-(7.85+6.4) 30 (3)28(5+969.9318) (4)81(72-54)9 571256035 8486401612 960(15003245) 192(5438)67 138254 (13125)(38) (12+24+80)50 70425 2532125 32(25+125) 178101178
7、8436+6484 7599+275 83102832 98199 123181233+85123 50(344)3 25(24+16) 17899+178 7942+79+7957 7300254 8100475 7527+192 5 31870+13310 4(2565+2528) 138254 (13125)(38) (12+24+80)50 2532125 32(25+125) 10276 5898 178101178 8436+6484 7599+275 83102832 98199 123181233+85123 50(344)3 25(24+16) 17899+178 7942+
8、79+7957 7300254 81004751.125*3+125*5+25*3+25 2.9999*3+101*11*(101-92) 3.(23/4-3/4)*(3*6+2) 4. 3/7 49/9 - 4/3 5. 8/9 15/36 + 1/27 6. 12 5/6 2/9 3 7. 8 5/4 + 1/4 8. 6 3/8 3/8 6 9. 4/7 5/9 + 3/7 5/9 10. 5/2 -( 3/2 + 4/5 ) 11. 7/8 + ( 1/8 + 1/9 ) 12. 9 5/6 + 5/6 13. 3/4 8/9 - 1/3 14. 7 5/49 + 3/14 15. 6
9、 ( 1/2 + 2/3 ) 16. 8 4/5 + 8 11/5 17. 31 5/6 5/6 18. 9/7 - ( 2/7 10/21 ) 19. 5/9 18 14 2/7 20. 4/5 25/16 + 2/3 3/4 21. 14 8/7 5/6 12/15 22. 17/32 3/4 9/24 23. 3 2/9 + 1/3 24. 5/7 3/25 + 3/7 25. 3/14 2/3 + 1/6 26. 1/5 2/3 + 5/6 27. 9/22 + 1/11 1/2 28. 5/3 11/5 + 4/3 29. 45 2/3 + 1/3 15 30. 7/19 + 12/
10、19 5/6 31. 1/4 + 3/4 2/3 32. 8/7 21/16 + 1/2 33. 101 1/5 1/5 21 34.5016040 35.120-14418+35 36.347+452-416052 37(58+37)(64-95) 38.95(64-45) 39.178-14556+42 40.812-700(9+3111) 41.85+14(14+20826)42.(6.8-6.80.55)8.5 43.120-36418+35 44.(58+37)(64-95) 45.(6.8-6.80.55)8.5 46.0.12 4.80.124.8 47.(3.21.5+2.5)
11、1.6 48.6-1.64= 5.38+7.85-5.37= 49.7.20.8-1.25= 6-1.193-0.43= 50.6.5(4.8-1.24)= 1.125*3+125*5+25*3+25 2.9999*3+101*11*(101-92) 3.(23/4-3/4)*(3*6+2) 4. 3/7 49/9 - 4/3 5. 8/9 15/36 + 1/27 6. 12 5/6 2/9 3 7. 8 5/4 + 1/4 8. 6 3/8 3/8 6 9. 4/7 5/9 + 3/7 5/9 10. 5/2 -( 3/2 + 4/5 ) 11. 7/8 + ( 1/8 + 1/9 ) 1
12、2. 9 5/6 + 5/6 13. 3/4 8/9 - 1/3 14. 7 5/49 + 3/14 15. 6 ( 1/2 + 2/3 ) 16. 8 4/5 + 8 11/5 17. 31 5/6 5/6 18. 9/7 - ( 2/7 10/21 ) 19. 5/9 18 14 2/7 20. 4/5 25/16 + 2/3 3/4 21. 14 8/7 5/6 12/15 22. 17/32 3/4 9/24 23. 3 2/9 + 1/3 24. 5/7 3/25 + 3/7 25. 3/14 2/3 + 1/6 26. 1/5 2/3 + 5/6 27. 9/22 + 1/11 1
13、/2 28. 5/3 11/5 + 4/3 29. 45 2/3 + 1/3 15 30. 7/19 + 12/19 5/6 31. 1/4 + 3/4 2/3 32. 8/7 21/16 + 1/2 33. 101 1/5 1/5 21 34.5016040 35.120-14418+35 36.347+452-416052 37(58+37)(64-95) 38.95(64-45) 39.178-14556+42 40.812-700(9+3111) 41.85+14(14+20826) 43.120-36418+35 44.(58+37)(64-95) 45.(6.8-6.80.55)8
14、.5 46.0.12 4.80.124.8 47.(3.21.5+2.5)1.6 48.6-1.64= 5.38+7.85-5.37= 49.7.20.8-1.25= 6-1.193-0.43= 50.6.5(4.8-1.24)= 51.5.8(3.87-0.13)+4.23.74 52.32.52-(6+9.7283.2)2.5 53.(7.1-5.6)0.9-1.15 2.5 54.5.42.6(3.7-2.9)+0.62 55.126(12-7.2)-6 56.1267.2-6 57.0.681.9+0.321.9 (58.58+370)(64-45) 59.420+580-642128
15、 60.136+6(65-34523) 15-10.750.4-5.7 62.18.1(30.2990.23)1 63.(6.8-6.80.55)8.5 64.0.12 4.80.124.8 65.(3.21.5+2.5)1.6 66.3.26+(1.5+2.5)1.6 67.0.681.9+0.321.9 68.10.15-10.750.4-5.7 69.5.8(3.87-0.13)+4.23.74 70.32.52-(6+9.7283.2)2.5 71.(7.1-5.6)0.9-1.15 2.5 72.5.42.6(3.7-2.9)+0.62 73.126(12-7.2)-6 74.126
16、7.2-6 75.33.02(148.490.85)2.5 1) 76.(25%-695%-12%)*36 77./4*3/5+3/4*2/5 78.1-1/4+8/9/7/9 79.+1/6/3/24+2/21 80./15*3/5 81.3/4/9/10-1/6 82./3+1/2)/5/6-1/3/1/7 83./5+3/5/2+3/4 84.(2-2/3/1/2)*2/5 85.+5268.32-2569 86.3+456-52*8 87.5%+6325 88./2+1/3+1/4 2) 89+456-78 3) 5%+. 3/7 49/9 - 4/3 4) 9 15/36 + 1/2
17、7 5) 2 5/6 2/9 3 6) 3 5/4 + 1/4 7) 94 3/8 3/8 6 8) 95/7 5/9 + 3/7 5/9 9) 6/2 -( 3/2 + 4/5 ) 10) 8 + ( 1/8 + 1/9 ) 11) 8 5/6 + 5/6 12) 1/4 8/9 - 1/3 13) 10 5/49 + 3/14 14) 1.5 ( 1/2 + 2/3 ) 15) 29 4/5 + 8 11/5 16) 3.1 5/6 5/6 17) 4/7 - ( 2/7 10/21 ) 18) 19 18 14 2/7 19) 5 25/16 + 2/3 3/4 20) 4 8/7 5/
18、6 12/15 21) 7/32 3/4 9/24 22) 1、 2/31/21/42/5 2、 26/139/262/3 3、 2/91/24/53/8 4、 105/91/64 5、 1/22/59/109/20 6、 5/93/102/72/5 7、 1/21/44/51/8 8、 3/45/74/31/2 9、 238/91/271/27 10、 85/62/54 11、 1/23/45/124/5 12、 8/93/43/83/4 13、 5/85/43/239/11 23) 1.22.5+0.82.5 24) 8.91.25-0.91.25 25) 12.57.40.8 26) 9
19、.96.4-(2.5+0.24)(27) 6.59.5+6.50.5 0.351.6+0.353.4 0.258.64 6.72-3.28-1.72 0.45+6.37+4.55 5.4+6.93-(25-2.5)241846-620-380 4.846+4.854 0.8+0.82.5 1.253.682.5-12.52.4 2812.5-12.520 23.65-(3.07+3.65) (4+0.40.25)871.25 1.6599+1.65 27.85-(7.85+3.4) 481.25+501.250.28 7.89.9+0.78 (1010+309+4+681+6)12 39146
20、7826854 5.157/8+6.1-0.60625 1. 3/7 49/9 - 4/3 2. 8/9 15/36 + 1/27 3. 12 5/6 2/9 3 4. 8 5/4 + 1/4 5. 6 3/8 3/8 6 6. 4/7 5/9 + 3/7 5/9 7. 5/2 -( 3/2 + 4/5 ) 8. 7/8 + ( 1/8 + 1/9 ) 9. 9 5/6 + 5/6 10. 3/4 8/9 - 1/3 11. 7 5/49 + 3/14 12. 6 ( 1/2 + 2/3 ) 13. 8 4/5 + 8 11/5 14. 31 5/6 5/6 15. 9/7 - ( 2/7 1
21、0/21 ) 16. 5/9 18 14 2/7 17. 4/5 25/16 + 2/3 3/4 18. 14 8/7 5/6 12/15 19. 17/32 3/4 9/24 20. 3 2/9 + 1/3 21. 5/7 3/25 + 3/7 22. 3/14 2/3 + 1/6 23. 1/5 2/3 + 5/6 24. 9/22 + 1/11 1/2 25. 5/3 11/5 + 4/3 26. 45 2/3 + 1/3 15 27. 7/19 + 12/19 5/6 28. 1/4 + 3/4 2/3 29. 8/7 21/16 + 1/2 30. 101 1/5 1/5 21 31
22、.5016040 (58+370)(64-45) 32.120-14418+35 33.347+452-416052 34(58+37)(64-95) 35.95(64-45) 36.178-14556+42 420+580-642128 37.812-700(9+3111) (136+64)(65-34523) 38.85+14(14+20826) 39.(284+16)512-820818) 40.120-36418+35 41.(58+37)(64-95) 42.(6.8-6.80.55)8.5 43.0.12 4.80.124.8 44.(3.21.5+2.5)1.6 (2)3.2(1
23、.5+2.5)1.6 45.6-1.64= 5.38+7.85-5.37= 46.7.20.8-1.25= 6-1.193-0.43= 47.6.5(4.8-1.24)= 0.681.9+0.321.9 48.10.15-10.750.4-5.7 49.5.8(3.87-0.13)+4.23.74 50.32.52-(6+9.7283.2)2.5 51.(7.1-5.6)0.9-1.15 2.5 52.5.42.6(3.7-2.9)+0.62 53.126(12-7.2)-6 (4)1267.2-6 1024.5 7.86.92.26.9 5.60.25 8(201.25) 1)127+352
24、+73+44 (2)89+276+135+33 (1)25+71+75+29 +88 (2)243+89+111+57 9405-29402821 920-1680407 690+4752-398 148+332864-75 3602432+730 2100-94+4854 51+(2304-2042)23 4215+(4361-716)81 (247+18)2725 36-720(36018) 1080(63-54)80 (528+912)5-6178 85284138-904 264+318-828069 (174+209)26- 9000 814-(278+322)15 1406+735
25、945 3168-782838+504 796-5040(6307) 285+(3000-372)36 1+5/6-19/12 3x(-9)+7x(-9 (-54)x1/6x(-1/3) 1.18.1(30.2990.23)1 2.(6.8-6.80.55)8.5 3.0.12 4.80.124.8 4.(3.21.5+2.5)1.6 (2)3.2(1.5+2.5)1.6 5.6-1.64= 5.38+7.85-5.37= 6.7.20.8-1.25= 6-1.193-0.43= 7.6.5(4.8-1.24)= 0.681.9+0.321.9 8.10.15-10.750.4-5.7 9.5.8(3.87-0.13)+4.23.74 10.32.52-(6+9.7283.2)2.5 11.(7.1-5.6)0.9-1.15 2.5 12.5.42.6(3.7-2.9)+0.62 13.126(12-7.2)-6 14.1267.2-6 15.33.02(148.490.85)2.5
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