目录50道有理数计算题 初一数学有理数计算 七年级混合运算1000道
[-|98|+76+(-87)]*23[56+(-75)-(7)]-(8+4+3)
5+21*8/2-6-59
68/21-8-11*8+61
-2/9-7/陆吵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+(-4)+(-2)+4*3
-2*8-8*1/2+8/1/8
(2/3+1/2)/(-1/蔽圆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
-1+2-3+4-5+6-7
-50-28+(-24)-(-22)
-19.8-(-20.3)-(+20.2)-10.8
0.25- +(-1 )-(+3 )
-1-〔1-(1-0.6÷3)〕×〔2-(-3)×(-4)〕
0÷(-4)-42-(-8)÷(-1)3
-32-(-3) 2-(-3)3+(-1)6
3×(-2)2+(-2×3)2+(-2+3)2
(-12)÷4×(-6)÷2
(-12)÷4×(-6)×2
75÷〔138÷(100-54)〕
85×(95-1440÷24)
80400-(4300+870÷15)
240×78÷(154-115)
1437×27+27×563
〔75-(12+18)〕÷15
2160÷〔(83-79)×18〕
280+840÷24×5
325÷13×(266-250)
85×(95-1440÷24)
58870÷(105+20×2)
1437×27+27×563
81432÷(13×52+78)
[37.85-(7.85+6.4)] ×30
156×[(17.7-7.2)÷3]
(947-599)+76×64
36×(913-276÷23)
-(3.4 1.25×2.4)
0.8×〔15.5-(3.21 5.79)〕
(31.8 3.2×4)÷5
194-64.8÷1.8×0.9 36.72÷4.25×9.9
3.416÷(0.016×35)
0.8×[(10-6.76)÷1.2]
(136+64)×(65-345÷23)
(6.8-6.8×0.55)÷8.5
0.12× 4.8÷0.12×4.8
(58+37)÷(64-9×5)
812-700÷(9+31×11)
(3.2×1.5+2.5)÷1.6
85+14×(14+208÷26)
120-36×4÷18+35
(284+16)×(512-8208÷18)
9.72×1.6-18.305÷7
4/宏悉塌7÷[1/3×(3/5-3/10)]
(4/5+1/4)÷7/3+7/10
12.78-0÷( 13.4+156.6 )
37.812-700÷(9+31×11)
(136+64)×(65-345÷23)
3.2×(1.5+2.5)÷1.6
85+14×(14+208÷26)
(58+37)÷(64-9×5)
(6.8-6.8×0.55)÷8.5
(284+16)×(512-8208÷18)
0.12× 4.8÷0.12×4.8
(3.2×1.5+2.5)÷1.6
120-36×4÷18+35
10.15-10.75×0.4-5.7
5.8×(3.87-0.13)
+4.2×3.74 347+45×2-4160÷52
32.52-(6+9.728÷3.2)×2.5 87(58+37)÷(64-9×5)
[(7.1-5.6)×0.9-1.15] ÷2.5 (3.2×1.5+2.5)÷1.6
5.4÷[2.6×(3.7-2.9)+0.62] 12×6÷(12-7.2)-6
3.2×6+(1.5+2.5)÷1.6 (3.2×1.5+2.5)÷1.6
5.8×(3.87-0.13)+4.2×3.74
33.02-(148.4-90.85)÷2.5
1,x-y=2xy=15 (x=5,y=3) 2,x+y=6 x-y=2 (4,2) 3,x+y=11,xy=30 (x=5,y=6,x=6,y=5) 4,x+y=13,xy=42 (x=6,7,y=7,6) 5,x+y=11,x-y=1 (x=6,y=5) 6,x+y=12,xy=35 (x=5,7,y=7,5) 7,x+y=5,xy=6 (x=2,3,y=3,2) 8,x-y=5,xy=36 (x=6,y=1) 9,x+y=10,xy=25 (x=y=5) 10,x+y=17,y-x=1 (x=8,y=9) 11,xy=2,x-y=1 (x=2,y=1) 12,x+y=3,xy=2 (x=1,2,y=2,1) 13,x+y=12,xy=11 (x=1,11,y=11,1) 14,x-y=8,xy=9 (x=9,y=1) 15,x+y=4,x-y=2 (x=3,y=1) 16,x+y=3,xy=0 (x=0,3,y=3,0) 17,x-y=5,xy=6 (x=6,y=1) 18,y-x=3,xy=28 (x=4,y=7) 19,y-x=2,xy=24 (x=4,y=6) 20,x+y=9,x-y=1, (x=5,y=4) 21. 66x+17y=3967 25x+y=1200 答案:x=48 y=47 22. 18x+23y=2303 74x-y=1998 答案:x=27 y=79 23. 44x+90y=7796 44x+y=3476 答案:x=79 y=48 (4) 76x-66y=4082 30x-y=2940 答案:x=98 y=51 (5) 67x+54y=8546 71x-y=5680 答案:x=80 y=59 1、计算:(1)-5-9+3; (2)10-17+8;(3)-粗橡仿3-4+19-11; (4)-8+12-16-23.2.计算:(1)-4.2+5.7-8.4+10; (2)6.1-3.7-4.9+1.8;3.计算:(1)(-36)-(-25)-(+36)+(+72); (2)(-8)-(-3)+(+5)-(+9);(3) ;(4)-9+(-3 )+3 ;4.计算:(1)12-(-18)+(-7)岩纤-15;(2)-40-28-(-19)+(-24)-如衫(-32);(3)4.7-(-8.9)-7.5+(-6);答案:1、(1)-11;(2)1;(3)1;(4)-352、(1)3.1;(2)-0.7;(3) ;(4) 3、(1)25;(2)-9;(3) ;(4)-94、(1)8;(2)-41;(3)0.1 (1)(-9)-(-13)+(-20)+(-2)(2)3+13-(-7)/6(3)(-2)-8-14-13(4)(-7)*(-1)/7+8(5)(-11)*4-(-18)/18(6)4+(-11)-1/(-3)(7)(-17)-6-16/(-18)(8)5/7+(-1)-(-8)(9)(-1)*(-1)+15+1(10)3-(-5)*3/(-15)(11)6*(-14)-(-14)+(-13)(12)(-15)*(-13)-(-17)-(-4)(13)(-20)/13/(-7)+11(14)8+(-1)/7+(-4)(15)(-13)-(-9)*16*(-12)(16)(-1)+4*19+(-2)(17)(-17)*(-9)-20+(-6)(18)(-5)/12-(-16)*(-15)(19)(-3)-13*(-5)*13(20)5+(-7)+17-10(21)(-10)-(-16)-13*(-16)(22)(-14)+4-19-12(23)5*13/14/(-10)(24)3*1*17/(-10)(25)6+(-12)+15-(-15)(26)15/9/13+(-7)(27)2/(-10)*1-(-8)(28)11/(-19)+(-14)-5(29)19-16+18/(-11)(30)(-1)/19+(-5)+1(31)(-5)+19/10*(-5)(32)11/(-17)*(-13)*12(33)(-8)+(-10)/8*17(34)7-(-12)/(-1)+(-12)(35)12+12-19+20(36)(-13)*(-11)*20+(-4)(37)17/(-2)-2*(-19)(38)1-12*(-16)+(-9)(39)13*(-14)-15/20(40)(-15)*(-13)-6/(-9)(41)15*(-1)/12+7(42)(-13)+(-16)+(-14)-(-6)(43)14*12*(-20)*(-13)(44)17-9-20+(-10)(45)12/(-14)+(-14)+(-2)(46)(-15)-12/(-17)-(-3)(47)6-3/9/(-8)(48)(-20)*(-15)*10*(-4)(49)7/(-2)*(-3)/(-14)(50)13/2*18*(-7)(51)13*5+6+3(52)(-15)/5/3+(-20)(53)19*4+17-4(54)(-11)-(-6)*(-4)*(-9)(55)(-16)+16-(-8)*(-13)(56)16/(-1)/(-10)/(-20)(57)(-1)-(-9)-9/(-19)(58)13*20*(-13)*4(59)11*(-6)-3+18(60)(-20)+(-12)+(-1)+(-12)(61)(-19)-3*(-13)*4(62)(-13)/3-5*8(63)(-15)/1+17*(-18)(64)(-13)/3/19/8(65)(-3)/(-13)/20*5(66)3/12/(-18)-18(67)5*(-19)/13+(-6)(68)4+4*(-19)-11(69)(-2)+17-5+(-1)(70)9+(-3)*19*(-19)(71)(-12)-(-6)+17/2(72)15*(-5)-(-3)/5(73)(-10)*2/(-1)/4(74)(-8)*16/(-6)+4(75)2-11+12+10(76)(-3)+(-20)*(-7)*(-9)(77)(-15)+8-17/7(78)(-14)*10+18*2(79)(-7)+2-(-17)*19(80)(-7)/18/1+1(81)11/(-9)-(-16)/17(82)15+5*6-(-8)(83)(-13)*(-18)+18/(-6)(84)11-(-1)/11*(-6)(85)(-4)+(-12)+19/6(86)(-18)/(-1)/(-19)+2(87)9*(-8)*(-6)/11(88)20*(-3)*(-5)+1(89)(-18)-2+(-11)/20(90)15*1+4*17(91)1-10+(-14)/(-1)(92)10+(-4)*(-19)+(-12)(93)15/14/5*7(94)8+(-13)/3+1(95)(-14)+6+(-2)*(-14)(96)(-5)/(-13)/4+7(97)(-15)/(-2)/(-12)+(-2)(98)(-17)-(-20)-20*(-10)(99)(-7)-10-13/3(100)(-20)+(-18)+11+9答案:1 -182 103/63 -374 95 -436 -(20/3)7 -(199/9)8 54/79 1710 211 -8312 21613 1021/9114 27/715 -174116 7317 12718 -(2885/12)19 84220 521 21422 -4123 -(13/28)24 -(51/10)25 2426 -(268/39)27 39/528 -(372/19)29 15/1130 -(77/19)31 -(29/2)32 1716/1733 -(117/4)34 -1735 2536 285637 59/238 18439 -(731/4)40 587/341 23/442 -3743 4368044 -2245 -(118/7)46 -(192/17)47 145/2448 -1200049 -(3/4)50 -81951 7452 -2153 8954 20555 -10456 -(2/25)57 161/1958 -1352059 -5160 -4561 13762 -(133/3)63 -32164 -(13/456)65 3/5266 -(1297/72)67 -(173/13)68 -8369 970 109271 5/272 -(372/5)73 574 76/375 1376 -126377 -(66/7)78 -10479 31880 11/1881 -(43/153)82 5383 23184 115/1185 -(77/6)86 20/1987 432/1188 30189 -(411/20)90 8391 592 7493 3/294 14/395 2096 369/5297 -(21/8)98 20399 -(64/3)100 -1832.52-(6+9.728÷3.2)×2.5 5. x^2(y+z)^2-2xy(x-z)(y+z)+y^2(x-z)^2 =[x(y+z)-y(x-z)]^2 =(xz+yz)^2 =z^2(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+a^2-c^2 =(a+b)^2-c^2+a^2-(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) 8. x(x+1)(x^2+x-1)-2 =(x^2+x)(x^2+x-1)-2 =(x^2+x)^2-(x^2+x)-2 =(x^2+x-2)(x^2+x+1) =(x+2)(x-1)(x^2+x+1) 9. 9x^2(x-1)^2-3(x^2-x)-56 =9x^2(x-1)^2-3x(x-1)-56 =[3x(x-1)-8][3x(x-1)+7] =(3x^2-3x-8)(3x^2-3x+7) 有理数练习 练习一(B级) (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) 5. x^2(y+z)^2-2xy(x-z)(y+z)+y^2(x-z)^2 =[x(y+z)-y(x-z)]^2 =(xz+yz)^2 =z^2(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+a^2-c^2 =(a+b)^2-c^2+a^2-(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) 8. x(x+1)(x^2+x-1)-2 =(x^2+x)(x^2+x-1)-2 =(x^2+x)^2-(x^2+x)-2 =(x^2+x-2)(x^2+x+1) =(x+2)(x-1)(x^2+x+1) 9. 9x^2(x-1)^2-3(x^2-x)-56 =9x^2(x-1)^2-3x(x-1)-56 =[3x(x-1)-8][3x(x-1)+7] =(3x^2-3x-8)(3x^2-3x+7) (二)用简便方法计算: (1)(-17/4)+(-10/3)+(+13/3)+(11/3) (2)(-1.8)+(+0.2)+(-1.7)+(0.1)+(+1.8)+(+1.4) (三)已知:X=+17(3/4),Y=-9(5/11),Z=-2.25, 求:(-X)+(-Y)+Z的值 (四)用">","0,则a-ba (C)若ba (D)若a<0,ba -38)+52+118+(-62)= (-32)+68+(-29)+(-68)= (-21)+251+21+(-151)= 12+35+(-23)+0= 利用有理数的加法解下面2题 (1)王老伯上街时带有现金550元,购物用去260元,又去银行取款150元,现在王老伯身上还有多少现金? (2)潜水艇原停在海面下800米处,先浮上150米,又下潜200米,这时潜水艇在海面下多少米处? (-6)+8+(-4)+12 3又1/4+(-2又3/5)+5又3/4+(-8又2/5) 9+(-7)+10+(-3)+(-9) 27+(-26)+33+(-27) (+4又5/8)+(-3.257)+(-4.625)23+(-17)+6+(-22) -2+3+1+(-3)+2+(-4) 23+(-73) (-84)+(-49) 7+(-2.04) 4.23+(-7.57) 7/3)+(-7/6) 9/4+(-3/2) 3.75+(2.25)+5/4 -3.75+(+5/4)+(-1.5) (-17/4)+(-10/3)+(+13/3)+(11/3) (-1.8)+(+0.2)+(-1.7)+(0.1)+(+1.8)+(+1.4) (+1.3)-(+17/7) (-2)-(+2/3) |(-7.2)-(-6.3)+(1.1)| |(-5/4)-(-3/4)|-|1-5/4-|-3/4|) (-4)(+6)(-7) (-27)(-25)(-3)(-4) 0.001*(-0.1)*(1.1) 24*(-5/4)*(-12/15)*(-0.12) (-3/2)(-4/3)(-5/4)(-6/5)(-7/6)(-8/7) (-24/7)(11/8+7/3-3.75)*24 (-71/8)*(-23)-23*(-73/8) (-7/15)*(-18)*(-45/14) (-2.2)*(+1.5)*(-7/11)*(-2/7)[-|98|+76+(-87)]*23[56+(-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+(-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
望采纳
(1)23+(-73) =-50
(2)(-84)+(-49)=-143
(3)7+(-2.04) =4.96
(4)4.23+(-7.57)=-3.34
(5)(-7/码雀灶3)+(-7/6) =-21/迟扮6
(6)9/4+(-3/2) =3/4
(7)3.75+(-2.25)+5/4 =11/4
(8)3.75+2.25+(-1.5) =4.5(这是计算岁销的)