七年级数学上册精品天天练47Word文档格式.docx
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5、计算。
711
4+—+—5×
(-5)-29×
(-5)
315
916
(-+-)÷
-(-78)×
10×
(-15)
855
111
-(—+—-—)×
2407×
[19+(-2)3]
586
6、合并同类项。
5y-(5y-7)y-(9y-6s)-(3s+6y)
-5(5s-8)+7s6+(6a-4)-(3a-9)
6(-ab-6a)-(5a-9b)16(abc-5a)-5(8a-5abc)
8(xy+6z)-(-xy+3z)-7(pq+pr)-(9pq+pr)
7、解方程。
5x1
—x-—=—0.5x-0.6=3-4.9x
683
81
—-6x=9+—x7(x+2)+8(x+2)=16
73
14
—(8x+2)=—x+93x+8(6-x)=-3
65
y-3y+1
——=1-——1.5x-7(x+3)=35
25
12
—(1-3x)=—(2x+4)7(9x-4)=8
47
5—,0.5,0,-6.4
—,-3,-6,3.8
2
3—,3.1,-8,-0.32
7
(1)-20与-5
(2)-2.25与2(3)|-9.1|与|-2.5|
(4)-—与-—(5)-10与-|-4|(6)|-3.1|与|-9.7|
93
77
1+—+—9×
(-2)+9×
(-2)
618
185
(---)÷
-(-90)÷
2÷
(-6)
474
113
964×
[17-(-4)2]
834
-9n+(5n-9)5n-(4n+2q)+(2q+n)
-8(6n+3)-7n9+(4b+4)+(7b+2)
9(-ab-2a)-(7a-5b)20(abc+3a)-6(8a+3abc)
8(xy+4z)+(-xy-4z)-6(pq-pr)+(5pq+pr)
—x+—=—0.1x+0.5=2.4-7.6x
366
21
—+4x=5-—x9(x-1)+3(x+7)=5
77
—(2x-9)=—x-99x-6(5-x)=-8
35
y+3y+2
——=4+——5x-1.5(x+4)=5
36
—(1-4x)=—(4x-1)8(7x-3)=7
37
-3—,1,0,7.2
-—,7,-10,-8.7
2—,4.25,0,-0.72
(1)-15与0
(2)-4与1.75(3)|-7.7|与|-2.5|
(4)-—与-—(5)13与-|-6|(6)|-81.2|与|-3.3|
47
111
5+—-—28×
(-9)+3×
(-9)
785
-(-96)÷
16÷
(-21)
876
171
-(—-—-—)×
1687×
[10+(-2)3]
387
-8m-(3m-8)m-(3m-5q)+(8q+m)
-5(2m-9)-4m5-(3y-3)+(5y+8)
5(-ab+7a)+(7a+6b)7(abc-8a)+6(6a+7abc)
5(xy-5z)-(-xy-4z)-7(pq-pr)-(7pq+pr)
—x-—=—0.5x+0.8=0.1-8.5x
623
—-6x=1+—x2(x+3)+3(x+4)=13
59
13
—(3x-8)=—x+68x-6(17+x)=-2
85
y-1y-3
——=5-——4.5x-6(x-2)=50
26
—(3+3x)=—(4x-2)4(4x-9)=19
43
-5—,5,0,2.4
-—,-20.5,-3,5.7
6
-8—,2.8,-1,0.64
(1)-11与4
(2)-5与1.5(3)|-7.4|与|-2.8|
(4)-—与-—(5)-17与-|-7|(6)|-26.4|与|-3.7|
89
6+—+—14×
(-2)+23×
958
(-+-)×
-(-120)÷
2×
867
548
841×
[19+(-3)2]
437
-4b-(5b+3)6b+(9b+4z)+(9z-8b)
5(9t+8)+3t8+(5a-3)-(6a-4)
3(-ab-3a)+(7a-5b)12(abc-3a)+4(5a+5abc)
3(xy+8z)-(-xy+2z)-3(pq+pr)-(7pq-pr)
7x1
—x-—=—0.2x+0.8=7.2-1.5x
—-5x=2+—x9(x+2)-3(x+2)=5
58
—(7x-8)=—x+99x-9(9+x)=-9
75
——=3+——2x-4(x+2)=25
—(3+4x)=—(2x-1)4(7x-2)=1
99
3
-5—,1.5,0,-4
—,13,-9,-2.4
-6—,0.8,0,0.8
(1)-10与-2
(2)-3与2.5(3)|-9.6|与|3|
(4)-—与-—(5)-20与-|-9|(6)|-74.5|与|-2.3|
83
8-—+—19×
(-20)-21×
(-20)
918
917
(---)×
-(-60)÷
18×
(-3)
868
336
1129×
[10+(-5)2]
447
4x+(2x+2)x+(5x+4c)-(6c-x)
-2(6t+10)+9t3+(9b+3)-(9b-4)
6(ab+3a)-(7a+7b)15(abc-7a)-7(7a-9