
2022年初中计算题练习题.docx
38页初中数学计算题强化训练一、 有理数的加、减混和运算1.(-0.7 )+(-0.4 )+(-0.3 )+0.5 2.( -3.2 )+(-5 )+(4 61 )+(-55 )63. (+15)+(-20 )+(+28)+(-10 )+(-5 )+(-7 )4.(-3.25)+3.75-1 +2.5+3 43 +(-4 41 ) 5.-2.6+[-1.4+8 23 -(-3 52 )]+4 3236.(-23)+(+3 51 )+(-3 42 )+(+2 53 )+(-1 41 )+(+1 21 ) 37.(-1 )-(-1 33 )-(-1 42 )-(+1.75) 8.2 33 -(-8 41 )+(-2 21 ) +0.25 -1.5 -2.75 49.(-1 )-(-2) -(+ 35 ) -(-31 ) 10. -1 3-(-1 )-(+ 23 ) 211.-321 -[5 31 +(-3 41 ) +(-5 71 ) +(-2 41 )]12.2 -7 5 -1213 -(-15 3 ) -(-151 )-3 12192013.2- 5 -11-{ 121 -[ 21 -(31 +41 )]} -4 14.5 61 -3.7- (-7 )- (-4 87 )+3+3.7 815.|-0.25|+(-31 )-(-0.75 )+|-0.125|+ 47 816.- (+0.5 )- (-31 )+2.75- (+7 41 ) 17.-|-21 - (+ 32 )|-|-31 |-|-43 | 418. (-11 )-(25.85 )- (+1 23 )- (-7.2 )- (+25.85 )- (-0.25 )419.|3-4|+(-5-8 )-|-1+5|-(5-20) 20.12 -1 32 + 54 - (-0.6 )- (-3 33 )521.1-[-1-(-3 )-5+ 74 ]+|4| 722、(357)÷149123623、7÷(21)1× (-4)224、-12-2(110.5)33(3)23935325. 135(3)5(7)26.(173)(6.25)(81)(0 .75)22164612424二、有理数的乘、除、乘方混和运算2 )33 7.-3 × 42 1.(-3 )2 2.-32 3.(-3 )3 4.-33 5.(-2 )32 6.(-8.(-3 × 4)2 9.-32× 2 3 10.(-3 )2× (-2 )3 11.-24312.-0.1 × (-0.1 )3 13.-2 × (-0.1 )3-(-0.2 )2+( -0.8 )14.-62× (-11 )22-32÷ (-11 )23× (-3 )15. (-2 )2- (-52)× ( -1 )5-24 ÷ (-3 )× ( -1 )2416.-2{[-3+(1-1.2 ×5 )÷ ( -2 )] ÷ 2} 17 .-3 62+(-21 )22-(-2 )3+| (-2 )2| 18.-23-[ (-3 )2-22×1 -8.5] ÷ (-41 )22 19.-32× 23 20.(-3 )2· (-2 )3 2 21.-2 × 322.(-2 × 3)2 23. (-2 )33 24.- (2 )32 25.-22 26 .( 3 2233 )27.|-2|3 28.-0.2 × (-0.1 )3 29. (-2 )2(-1 )5-(-2 )23- (-1 )30.-3 ÷ (-43 )× ( -44 ) 31.17-8 ÷ (-2 )+4· (-2 ) 32 .-2 33-3 · (-1 )35、0.8 ×(-1 )8、(- ) ÷(- ) 36、(-4) ÷(- 12)×37、4×(-2)3-(-3)238、(-3 ) ×(+2 ) ÷ ( -3 ) 39、(- ) 2·(-2)3÷(-1) 540、71×(-8) 14、(-2)3×(-4) ×1.25 41、(-75%) ×(-21)+(-125) × -75×(-0.24)42. 3 。
17. 224 43. 23 44. -( -2)3( -0.5)4. 53245. 23-3 2-(-2) ×(-7)46. -14-1 [2-(-3) 2]. 6(三)有理数加、减、乘、除、乘方混和运算1 )] ÷ (-2 )21.-3602 ÷ |-24| 2 3.(-11 )- (-21 )- (+ 31 )43.-32× (-2 )2+0.2534× (-4 )3+2007 4.-3-(3 )3[3+0.4 × (-15.(1 -21 +31 -41 +6 1 -10 1 )× ( -60 )-2 12126.(4x2-7x-3)-(- 5x 2-5x+5) 7.25a-3 a[56 a( 3 a1 )]( 7a2 )8.-32-[ (-5 )3+(1-0.2 ×3 )÷ ( -0.2 )] 9 .2-58(1 )2[(4)2(2 )5(6)]610.(-2 )2-(-52)× ( -1 )5-24 ÷ (-3 )× ( -1 )2411.-62× (-11 )22-3 2÷ (-11 )23× (-3 )12.-2 × (0.1 )3-(- 0.2 )2+(-0.8 ) 13 .-2-[3(112.5)(2 )]2614.-101 ÷89 ×41 ÷ (-2 )× ( -64) 15 9.-5 ÷81 -0.25 × (-5 )1616.-11 ÷ [1 21 + 21 × (-2 )] ÷31 ] 17 4.-11 -1+1 21 × [- (-21 )318.(-1 )÷ (302 -31 + 101 -62 ) 19 5.(-3 )2× ( -2 )320.-32+(-21 )22-(-2 )2+|-22| 21.-23-[ (-3 )2-22×1 -8.5] ÷ (-41 ) 2222. 143 ° 29′47″ +36° 30′13″ 23. 91° 4″ +57° 27′49″24. 15 ° 27′34″ × 3 25. 147° 37′46″ ÷ 4 (四)代数式 混和运算 整 式 的 乘 除 法公式:(a m)N=a mn(a· b)N=aNb N a-9=13· (12a 3b)a91.2x2y3(5xyz2) 2.(-4x2y)· (-x2y2)· (1 y )25163.(-2an+1bN)2· (-3aNb)2· (-a2c) 4 .(-1 ab 2c)22· (-1 abc )35.(-1ab)(2ab22 ab4b1) 6 .2(3x-2y )(x+5y)-6 (x-y )(3x+2y)2337.23× 17 8.(a+b-c )(a-b+c ) 9.100.5 × 99.5 10.[2x 2-(x+y)(x-y)][ (z-x )(z+x)+(y-z )(y+z)] 11.(y+2x)(2x-y )-2 (3x-2y )(-2y-3x )- (31x-3y )(2x-3y )12.(1-1 )(1-221 )(1-231 )⋯ ⋯ ( 1-241 )(1-291 )=210112013.(2a+2b+1)(2a+2b-1)=63,求 a+b 14 .(2+1)(22+1)(2 4+1)(2 8+1)(2 16+1)15.1999 2-1998× 2002 16.2000 2-1999 2+1998 2-1997 2+⋯ ⋯ + 22-1 217.(a+b+c)2 18.(991 )52 19. 100· 2220.(x+1)(x+2)(x+3)(x+4) 21 .a 2+b2+c2-2a+4b-6c+14=0,求 c-a+b 的值22.已知 a+b=5,ab=3,求 a 2+b 2 与 a-b 的值23.已知 x+1 =3,求 x x2+1的值, x4+1的值。
x2x424.(a+b)2(a-b )2 25.已知 a-b =5,ab=-3 ,求( a+b)226.9x2-mxy+16y2,求 m 27.已知( a+b)2=1,(a-b)2=25,求 a 2+b 2+ab的值有理数混和运算(四)整式的加减、化简、求值1.6a+7a 2-5a-6a2(其中 a=-3 ) 2 .5x2-3x3-x-4+3x3+2x-x2-9 (其中 x=11 )23.(3a 3-2a2+a-1)- (4a 3-2a2-3a+2)(其中 。












