1、-_七年级有理数四则混合运算题 九十道(有答案的)39+-23+0+-16= 0 -18+29+-52+60= 19 -3+-2+-1+0+1+2= -3 -301+125+301+-75= 50 -1+-1/2+3/4+-1/4= -1 -7/2+5/6+-0.5+4/5+19/6= 1.25 -26.54+-6.14+18.54+6.14= -8 1.125+-17/5+-1/8+-0.6= -3 -|98|+76+(-87)*2356+(-75)-(7)-(8+4+3) 5+21*8/2-6-59 68/21-8-11*8+61 -2/9-7/9-56 4.6-(-3/4+1.6-4-3
2、/4) 1/2+3+5/6-7/12 2/3-4-1/4*(-0.4)/1/3+2 22+(-4)+(-2)+4*3 -2*8-8*1/2+8/1/8 (2/3+1/2)/(-1/12)*(-12) (-28)/(-6+4)+(-1) 2/(-2)+0/7-(-8)*(-2) -_(1/4-5/6+1/3+2/3)/1/2 18-6/(-3)*(-2) (5+3/8*8/30/(-2)-3 (-84)/2*(-3)/(-6) 1/2*(-4/15)/2/3 -3x+2y-5x-7y 有理数的加减混合运算 回答者: 370116 - 翰林文圣 十八级 1-22 10:56我来评论您觉得最佳答案好
3、不好? 目前有 5 个人评价60% (3) 40% (2) 相关内容 初中一年级有理数混合计算题(300 道以上)带答案 谁有小学六年级至初一有理数的计算的计算题啊? 关于有理数计算题和答案 谁有初一有理数计算题(我要 1000 道) 编写一个小学数学辅助教学软件,主要是测试小学低年. 更多关于 300 道简单的有理数运算的问题 查看同主题问题:有理数的混合运算 其他回答 共 1 条-_1计算题 (1)328-476+1 - ; (2)275-2 -3 +1 ; (3)42(-1 )-1 (-0.125 ); (4)(-48) 82-(-25) (-6)2; (5)- +( )(-2.4).
4、2.计算题:(105=50) (1)-231 (-1 )2(1 )2; (2)-14-(2-0.5 ) ( )2-( )3; (3)-1 1-3(- )2-( )2(-2)3 (- )3 (4)(0.12+0.32) -22+(-3)2-3 ; (5)-6.2432+31.2(-2)3+(-0.51) 624. -|98|+76+(-87)*2356+(-75)-(7)-(8+4+3) 5+21*8/2-6-59 68/21-8-11*8+61 -2/9-7/9-56 4.6-(-3/4+1.6-4-3/4) 1/2+3+5/6-7/12 2/3-4-1/4*(-0.4)/1/3+2 22+(
5、-4)+(-2)+4*3 -2*8-8*1/2+8/1/8 (2/3+1/2)/(-1/12)*(-12) -_(-28)/(-6+4)+(-1) 2/(-2)+0/7-(-8)*(-2) (1/4-5/6+1/3+2/3)/1/2 18-6/(-3)*(-2) (5+3/8*8/30/(-2)-3 (-84)/2*(-3)/(-6) 1/2*(-4/15)/2/3 -3x+2y-5x-7y 75138(100-54) 85(95144024) 80400(430087015) 24078(154-115) 14372727563 75-(12+18) 15 2160(83-79)18 280
6、840245 32513(266250) 85(95 144024) 58870(105202) 14372727563 81432(135278) 37.85- (7.85+6.4) 30 156(17.7-7.2)3 (947599)7664 36(91327623) 192 (5438)67 (7.1-5.6)0.9-1.152.5 81432(13 5278) 5.42.6(3.7-2.9)+0.62 (947599)7664 60(9.528.9)0.18 2.8810.430.243.5 20(2.441.8) 0.40.15 28-(3.4 1.252.4) 0.815.5-(3
7、.21 5.79) (31.8 3.24)5 19464.81.80.9 -_36.724.259.9 3.416(0.01635) 0.8(106.76)1.2 (136+64 )(65-34523) (6.8-6.80.55)8.5 0.12 4.80.124.8 (58+37)(64-95) 812-700(9+3111) (3.21.5+2.5)1.6 85+14( 14+20826) 120-36418+35 (284+16 )(512-820818) 9.721.6-18.3057 4/71/3(3/5-3/10 ) (4/5+1/4) 7/3+7/10 12.780( 13.41
8、56.6 ) 37.812-700(9+3111) (136+64 )(65-34523) 3.2(1.5+2.5 )1.6 85+14( 14+20826) (58+37)(64-95) (6.8-6.80.55)8.5 (284+16 )( 512-820818) 0.12 4.80.124.8 (3.21.5+2.5)1.6 120-36418+35 10.15-10.750.4-5.7 5.8(3.87-0.13)+4.23.74 347+452-416052 32.52-(6+9.7283.2)2.5 87(58+37)(64-95) (7.1-5.6)0.9-1.15 2.5 (3
9、.21.5+2.5 )1.6 5.42.6(3.7-2.9)+0.62 126(12-7.2)-6 3.26+( 1.5+2.5) 1.6 (3.21.5+2.5)1.6 5.8(3.87-0.13)+4.23.74 33.02(148.490.85)2.5 (一) 计算题: -_(1)23+(-73) (2)(-84)+(-49) (3)7+(-2.04) (4)4.23+(-7.57) (5)(-7/3)+(-7/6) (6)9/4+(-3/2) (7)3.75+(2.25)+5/4 (8)-3.75+(+5/4)+(-1.5) (9)(-17/4)+(-10/3)+(+13/3)+(11
10、/3) (10)(-1.8)+(+0.2)+(-1.7)+(0.1)+(+1.8)+(+1.4) (11)(+1.3)-(+17/7) (12)(-2)-(+2/3) (13)|(-7.2)-(-6.3)+(1.1)| (14)|(-5/4)-(-3/4)|-|1-5/4-|-3/4|) (15)(-2/199)*(-7/6-3/2+8/3) (16)4a)*(-3b)*(5c)*1/6 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
11、 -_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 0.121.80.9=7.2 (95)0.3=1.02 6.4-=28+4.4 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 2/7 17. 4/5 25/16 + 2/3 3/4 18. 14 8/7 5/6 12/15 19. 17/32 3/4 9/24 2
12、0. 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 31.5016040 (58+370)(64-45 ) 32.120-14418+35 33.347+452-416052 34(58+37 )(64-95) 35.95(64-4
13、5) 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(1.5+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-
14、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.-5+58+13+90+78-(-56)+50 52.-7*2-57/(3 53.(-7)*2/(1/3)+79/(3+6/4) 54.123+456+789+98/(-4) 55.369/33-(-54-31/15.5) 56.39+3x42/2x(3x8) 57.9x8x7/5x(4+6) 58.11x22/(4+12/2) 59.94+(-60)/10 1. a3-2b3+ab(2a-b)
15、 =a3+2a2b-2b3-ab2 =a2(a+2b)-b2(2b+a) =(a+2b)(a2-b2) =(a+2b)(a+b)(a-b) 2. (x2+y2)2-4y(x2+y2)+4y2 =(x2+y2-2y)2 3. (x2+2x)2+3(x2+2x)+x2+2x+3 =(x2+2x)2+4(x2+2x)+3 -_=(x2+2x+3)(x2+2x+1) =(x2+2x+3)(x+1)2 4. (a+1)(a+2)+(2a+1)(a-2)-12 =a2+3a+2+2a2-3a-2-12 =3a2-12 =3(a+2)(a-2) 5. x2(y+z)2-2xy(x-z)(y+z)+y2(x-z)2 =x(y+z)-y(x-z)2 =(xz+yz)2 =z2(x+y)2 6. 3(a+2)2+28(a+2)-20 =3(a+2)-2(a+2)+10 =(3a+4)(a+12) 7. (a+b)2-(b-c)2+a2-c2 =(a+b)2-c2+a2-(b-c)2 =(a+b+c)(a+b-c)+(a+b-c)(a-b+c) =(a+b-c)(a+b+c+a-b+c) =2(a+b-c)(a+c)
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