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初一计算题练习 (2)

发布时间:2013-10-09 12:01:04  

汇智教育 开福校区 联系电话:88861012

?11??1.5?1.4?4.3?5.2?3.6 ??6?????

????0.5?11??1?

3?6?????24??

?3?????5????1?0.2?3??

5?????2???

?3

4??????2?2????1?2

??1??

??4?2??

?1

12???11?

?0.3?33?3?????2?

?32??2.5?7.3?2.5?(?2.4)?2.5?(?1.7)?|?5|????12???5??1???2?3?1????????3?? -9+5×(-6) -(-4)2÷(-8) 4?6x?2x?12?3 1

汇智教育 开福校区 联系电话:88861012

x?12?3x)―15―(―0.25) ??1 15+(―1

23

941111(?81)???(?32) —48 × (???) 49436612

3?5????4?2???????? (2m+2)×4m ?2?4?8??

(2x+y)-(2x-y)

[(3x+2y)(3x-2y)-(x+2y)(3x-2y)]÷3x

先化简后求值:m(m-3)-(m+3)(m-3),其中m=-4.

22 (143222xy)·(-12xy)÷(-xy) 33

2

汇智教育 开福校区 联系电话:88861012

143232 2 4×(-3)-13+(- )-|-4| -3-[(-2)-(1-×)÷(-2)] 254

2x-19=7x+31

化简(求值)2(xy?xy)?2(xy?x)?2xy?2y的值,其中x??2,y?2

22223x?15x?7- = 1 46

12332?21?16?(?)2?4?(?3) ?5x?6?3x???x?2x?3? 2

先化简,再求值,已知a = 1,b = —

的值

-2-(-3)×(-1)-(-1) -1-(1-0.5)×

3 23451?212?3323,求多项式?a?2b??2?ab?ab??2?ab?b?23??12×[2-(-3)] 3

汇智教育 开福校区 联系电话:88861012

32211+(-22)-3×(-11) (2)(?3)2?()2??6??3

-2(x-1)=4

48?(?1

6?11

4?12)

(?1)?32

3-(-6) -1

-23-3×(-2)3-(-1)4

293-8x=3-1/2x 18?6???2????1???3?? 2-(1-0.5)×(-113)×[2-(-3)2] (-3)2?22?|-3|?(?0.25)?(1)632 4

汇智教育 开福校区 联系电话:88861012

?1?

1111?? (?2)??(?3) 2483

7111?32?2?3?(?2)2 [50?(??)?(?6)2]?(?7)2 9126

先化简,再求值:3(x?y)?2(x?y)?2,其中x??1,y?

3. 4

772???(?6)2 化简:(4a2?3a)?(2a2?a?1)?(2?a2?4a) 483

先化简,再求值:

2x-15x-12(x-2)+2=x+1 -=1 36

11??31?2?x?2?x?y2????x?y2?,其中x=-2,y=。 23??23?3?

5

汇智教育 开福校区 联系电话:88861012

13?14??2?(?3)2 (?4)2?(?)?30?(?6) 64??

解方程:4?3(2?x)?5x 解方程:

2x?1x?2??1 32

3579111315311 (??)?8?(?48) ??????2612203042564612

12?1?[3?(?)2?10] -22+22×[(-1)10+|-1|] 23

231(??)?(?24)317315 (??)?(60??60??60?) 3465212777

6

汇智教育 开福校区 联系电话:88861012

1?6?(?)?2?(?1.5)5 ?36?4?(?2.5)?(?0.1)

22??(?3)?3???(?3)?(?4) ?1.5?1.4?4.3?5.2?3.6

11x??,y??(2x?3y)?(2x?2y)?1错误!45 先化简,再求值:未找到引用源。,其中22

?1?313??51321?????24??5 ?4???5??4??22?4 ???????24?864??84????

?1???2?x2?3x?2y2??3?4?3x?2x2? 3x2y?2?x2y??xy?x2??2x2? 4????

11???6?????? ?32?

7

汇智教育 开福校区 联系电话:88861012

11??1????0.5?????? ?2.5?7.3?2.5?(?2.4)?2.5?(?1.7) 36??24??

??3???3???5??1?0.2?????2?? 5????

122化简求值.2xy+[7x-3(2x-1)-2xy]+y,其中x?2,y??。 2

??8????1? 8?(?10)?(?2)?(?5)

5??131???5?????? ?24?????? ?4??243?

48?(?)??16 ?36?(?6)?72?(?8) 5

8

汇智教育 开福校区 联系电话:88861012

1?4?2?23?2???????2????5? 3x-2(x-3y) 2?3?

( x2?y )?4 ( 2x2?3y )

?12?(2

3?1

2)?(?5)

?21

2?(42111

3?16?32)?(?23)

???1

?4.5???(?5)?(1?25?0.7)??2?????55

12?(?2)?0?147?24?(?29)?(?2)?(32?23)

9 ?|?5|????1???1?2?23?1?????????5???3?? ?0.53?(?2)3?1?3????(?3)2???32 ???21?3232??(0.2)?25????2?3(?1)6??4

汇智教育 开福校区 联系电话:88861012

421?13??33422?117

?1??()??(?1)3; (?)?(?)?(?)?3?(?3)(?1)???2

?232?

(?3)2?(?32)?(2?3)2?2?32;

1+(-2)+︱-2-3︱-5

???1?16?3?4?

?

???48?

?12009???5?2?????5?

3??

?0.8?1

?2?16?(?15)2?152?1

9

(?23

)÷(?5

8)÷(-0.25)

︱?927︱×(3-15)―1 2008

3× (-1)?40?28???19????24?

10

汇智教育 开福校区 联系电话:88861012

3?211?

23??2 ??????60?????4? ??

??

?31215?

?22?2?3???1?

2

?16???2?3?????1?

8??

???4? 5.6

12???121?4?3??2??

32÷[(-2)3

-(-4)]

?62??2

123?

???3?3???

3

5

?

2

-7+3.4

?32???1????3???24????1?2??

化简:-3(2x-5)+6x 11

汇智教育 开福校区 联系电话:88861012

(-14)-(-16)-(+6) 解方程:5(8-3x)=x

51?(?4)2?0.25?(?5)?(?)3 82

先化简,再求值:

当x??123111x?(2x?y2)?(x?y2),其中x??,y?? 2323421,y??3时,求代数式3(x2?2xy)?[3x2?2y?2(xy?y)]的值 2

23×(-4)+(-28) ÷7 4×(-3)-15÷(-3)-50

先化简,再求值: 2x+(-x+3xy+2y)-(x-xy+2y),其中x=

4x+3=2(x-1)+1

222221,y=3. 2x?1x?24?x ??362

12

汇智教育 开福校区 联系电话:88861012

77(13

4?8?32)?8 (?1)32?[(?2)3?32]?(?)

4x?3(20?x)?3

3?x?6?1

x?13?2x??1236x-7=4x-5

3(?4)2?(?)?30?(?6) 4

2332先化简,再求值:(5a+2a-3+4a)-(-a+4a+2a),其中a=1

23(?4)??8?(?3)3?(?3) 42?(?)?(?)?(?0.25) 34

13

汇智教育 开福校区 联系电话:88861012

42?23??(?)2?(?1)4 7a?5b?(15a?b) 93

?3(2x2?xy)?4(x2?xy?6)

先化简,再求值:

111(?4a2?2a?8)?(a?1),其中a? 242

112514117(?2)?[(?)2?()3]?|?|?(?5) 9?(?15)?(2.5??3?1) 22425828

当x??

1,y??3时,求代数式3(x2?2xy)?[3x2?2y?2(xy?y)]的值。 2

1(?2)3?2?(?4)? ?103?[(?4)2?(1?32)?2] 4

化简求值: 5a?[3a?2(2a?3)?4a],其中a??

221 2

14

汇智教育 开福校区 联系电话:88861012

2

?20?(?14)?(?18)?13 ?1.6?[(?)2?(?3)3?(?2)2]

2(3y?1)?7(y?2)?3

(-8)+10+2+(-1) 5+(

(-0.8)+1.2+(-0.7)+(-2.1)+0.8+3.5

(-17)+59+(-37) (

3

x3x?15x?3

3?2?4?

6

-6)+3+9+(-4)+(-7) 12+(-23)+4

5+(-112)+(-3

)

-18.65)+(-6.15)+18.15+6.15 15

汇智教育 开福校区 联系电话:88861012

(-4111112)+(-3)+6+(-2) (-0.5)+3+2.75+(-5) 332442

(-1.9)+3.6+(-10.1)+1.4 (-7)+(+11)+(-13)+9

333821192+(-2.16)+9+(-3) 49+(-78.21)+27+(-21.79) 1111252121

先化简再求值:4ab+(-2ab+5ab)-2(3ab-ab),其中a=-1,b=-

222222 3

4x-3(5-x)=6

(-3+3)×[(-1)

22008x-3x-4-=1 53-(1-0.5×1)] 3

16

汇智教育 开福校区 联系电话:88861012

-2×|-3|+(-6) ×(-

2511)-|+|÷(-) 8122

3(-2x-5)+2x=9 2x-

化简求值:2x+(-x+3xy+2y)-2(0.5x-

222212x?1=-1 36112xy+y),其中x=,y=3. 22

0.4x?0.90.03?0.02xx?5335 ?4? ??(-+-)?(-7)0.50.0327414

?3?1?3??1?312 ?1???2?????2? ?1?(0.28-14+4)143??4?2????2?

1135?3?0.71??3.5?(-32.5)-7.1?0.075 44

212???1?(?3)2?2?????4?22???? ????

17

汇智教育 开福校区 联系电话:88861012

化简求值 8xy?3x

(-3)-2 ÷23?2 ??5x?2?3xy?2x?,其中x=-1,y=12211222×3 -1-[2-(1-×0.5)]×[3-(-2)] 3

(1-16+3

4)×(-48) 2x

2

7(3x+7)=2-1.5x

80% ·x =(x+22)·75%

????3?

5???1?1?

3?3????19??

3+3=x-1 2x?15x?13-6=1 ?41?4334?2113?(?34) 18

汇智教育 开福校区 联系电话:88861012

?4??3???0.8???(?2) ?32?(?2)3??(?1)6??(?3)??3?(?2)2

??3?5???16??

x1?2?3x?7?14?4x ???4???4 32?3?

2x?32?3x ?1?32

先化简,再求值3x?(2x?x?1)?2(?3?x?x),其中x??3

[15.25-13-(-14.75)]×(-0.125)÷

-1?[1

222213573 ()÷ ??3246122321?8×(-3)]×0-(-5)2 3?6÷(-2)?(-4)×2 524

19

汇智教育 开福校区 联系电话:88861012

x?2(x?1)?3x ?(y?x)?(5x?2y)

3x?4?7x?8

3?x2?2

3(x?4)

-14-(-2)3×5+0.25÷(-12

2)

-42×5??5?(-4)3×1?22

84÷4

x?(7?8x)?3(x?2) x?x?12?2?x?23 25?34???25??1?1?2?25????4?? -12-[2-(1-1×0.5)]×[32-(-2)23] 20

汇智教育 开福校区 联系电话:88861012

1311??

(-+-)×(-48) ?32?(?2)3??(?1)6??(?3)??3?(?2)2

66412??

15+(―1)―15―(―0.25) 2923

24

×(-12) 25

(—5.3)+(—3.2)—(—2.5)—(+4.8)

??48??6???25????4?

21

(?81)?94?4

9

?(?32)

×3―(―25)×1+25×(-1)

(—314)+(+8132)—(—54

)(?23

?34

?56

)?(?12)

汇智教育 开福校区 联系电话:88861012

-2+|5-8|+24÷(-3) ??1??1???2????3????1?

?1?1?1??3??1?

?

7100?2004?

7

100

?121?1?3???103????81?3???32?3? (?

(?1.25)?8?1.25?(?8) -2 (-56)+(+3.5)+(-1

6

)

?2?4?2??4??4?

?1.5?1.4???3.6??4.3???5.2? 13?16?1

4

)?(-24)

3

2-1?1?8???2??

??5.7????1.8??2.3 22

汇智教育 开福校区 联系电话:88861012

31111?1?8???????5?? ??? ?4?4

32?(?4)3?3?843?(?6)?(?13?18);

(10x3?6x2?5x?4)?(?9x3?2x2?4x?2)

15?(7?5x)?2x?(5?3x)

1?

3??y?1

3?y?8?????1

23 324332?(?3)2|?1012022|?21?38x?[3x?(7x?2)?4] 2x?156?x?18?1 x0.18?0.03x0.5?0.02?1

汇智教育 开福校区 联系电话:88861012

?3?2???3?12?(?8)?(?11)?(?6) ?5???7?????7?

????231?

3?4?12?????24?

?31?36?(?2)2?2?(?6)

x?(?215

3)?6

(?3)2?[(?211

3)?(?4)]?12 3.6

?8?3???8??4.5?295?8 ?14?126??2???3?? 2x??1 ÷4.5-3×| - 19 | 24

汇智教育 开福校区 联系电话:88861012

1??1?22??2?2???4?2????1??3???2??2???2????? ?2??2?

??3??3?52????2???1?0.8????22???2?? 4??????

(-3)×(-9)-8×(-5) -63÷7+45÷(-9)

-3×2-(-3×2) (-0.1)-

-2-3×(-2)-(-1) (-)?

[11×2-|3÷3|-(-3)-3]÷

25 2333423313?(-)2 4532221?|-3|?(?0.25)?()6 323213 2?(-1)-(-1.2)2?0.42 ) 492

汇智教育 开福校区 联系电话:88861012

0.25???2?

3??2?2???4?????1? ????3??

132522?1??32?12.2???0.3????????3????1? ??2??22?????10? ?3?432

32?1???2????0.5????2????8? ?2?

?32?4 2-7+4-3

4-(-2)-3÷(-1) (-5)×(-

(-2)-(-1)×(

2333239)÷(-) 525111311-)÷-?1 25×-(-25)×-25× 236424

26

汇智教育 开福校区 联系电话:88861012

1÷[(-2)×0.5-(-2.24)÷(-2)]-12237112 {4+[-9×(+)-0.8]}÷(-5) 8

(-16)+(+27)+(+9)+(一24) (

(一3)×18+14

(?11

5)?(?34

5)

?36?(111

9?6?18);

295一5)+(一2)+(+9)一(一8) ?9?40?25; (?2)?13?(?3) ?134?213?(?32)???3?; 27

汇智教育 开福校区 联系电话:88861012

?32?2?3?(?2)2 ?20?(?14)?(?18)?13

211111??1?(?2)?(?2.75) (-24)×(-+) 524642

-14-(-2)3×5+0.25÷(-

12 31?1?)25????25???25????422?4?

设A=2x+3x-x, B=4x+8x-2x+6,当x=

323211时,求A-B的值 22

(5a-3b)+[(a+b)-(5a+3b)],其中a=-1,b=1

222222

28 21?(?) 9—(—3) 510

汇智教育 开福校区 联系电话:88861012

(—5)—5 (—3

113)+(+8)—(—5) 424

(—5.3)+(—3.2)—(—2.5)—(+4.8) 15+(―1)―15―(―0.25) 4

9423(?81)???(?32) 29×(-12) 4924

42425×3―(―25)×1+25×(-1) ??48??6???25????4?

12—(—18)+(—7)—15 (?

235??)?(?12) 346

29

汇智教育 开福校区 联系电话:88861012

52?1?

??2x2?x?1??6?x2?x?2?,其中x??

3 3?2?

-2+|5-8|+24÷(-3) ??1??1???2????3????1?

??1?2?1?4?1??2??3??4??1?4?

?

77

?1.5?1.4???3.6??4.3???5.2? ?2004?

100100

?12??10???8??3? ??9????19????29??……??99?

1?3?1?3?1?3?2?3?

??1????2????3????4??……???99????100? (

111

??)?(-24) 364

(?1.25)?8?1.25?(?8)

30

汇智教育 开福校区 联系电话:88861012

51?1?21 -2-??? (-)+(+3.5)+(-) 38?2?

??5.7????1.8??2.3

11

3?2?1

4?1

3

|?32?(?3)2|?1012022

21?3

8x?[3x?(7x?2)?4]

668?????1?4?????5??34 32?(?4)3?3?843?(?6)?(?13?18); (10x3?6x2?5x?4)?(?9x3?2x2?4x?2) 15?(7?5x)?2x?(5?3x) 31

汇智教育 开福校区 联系电话:88861012

1?12x?15x?1???1 ?y??y?8???1 68

x0.18?0.

0.5?03x

0.02?1

3?3?32

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