七年级数学上册精品天天练17Word下载.docx
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711
9-—+—30×
(-18)+10×
(-18)
915
149
(-+-)÷
-(-180)×
12÷
(-12)
338
997
-(—-—-—)×
5122×
[17+(-3)3]
888
6、合并同类项。
7m+(9m-1)m+(5m-3z)+(2z+m)
-2(7b-3)-4b4-(3m-6)+(4m-7)
8(-ab+6a)+(2a-2b)3(abc+3a)-2(5a-7abc)
7(xy+6z)+(-xy+7z)-7(pq+pr)-(4pq+pr)
7、解方程。
5x1
—x+—=—0.4x-0.6=8.1-2.1x
343
21
—+9x=4+—x6(x+5)+4(x+8)=11
92
11
—(8x+5)=—x-37x+9(17+x)=-2
25
y-1y-1
——=3+——0.5x-9.5(x+5)=15
26
12
—(4+3x)=—(4x-4)7(4x+3)=1
63
4—,-3.5,0,-3.2
—,6,-10,-2.1
-6—,-0.6,-3,0.56
(1)-14与7
(2)-3.25与2(3)|-5.7|与|3.3|
(4)-—与-—(5)7与-|-1|(6)|-27.9|与|-6.7|
99
77
7+—+—27×
(-18)-5×
318
517
-(-144)÷
10×
(-21)
438
511
-(—-—+—)×
3848×
[19+(-2)3]
688
4a-(8a+6)9a-(5a+7q)+(2q+8a)
3(4t+7)-9t9+(5b-7)-(5b-2)
8(ab-6a)+(8a-2b)10(abc+2a)-7(3a+3abc)
7(xy+9z)+(-xy-9z)-2(pq-pr)-(7pq+pr)
—x+—=—0.6x-0.6=4.4+4.8x
643
—-6x=8+—x6(x-3)-9(x-7)=13
94
13
—(7x+5)=—x+35x-5(1+x)=-9
65
y-1y-2
——=5+——1.5x-3(x+1)=45
46
—(2+3x)=—(2x+5)2(3x+9)=9
37
3
-3—,3.5,0,-5.6
-—,22.5,10,6.6
9—,0.65,6,0.4
7
(1)-19与-6
(2)-4.5与1.25(3)|-7.3|与|-1|
(4)-—与-—(5)-14与-|-4|(6)|-94.2|与|-5|
23
6+—+—8×
(-12)-8×
918
264
(-+-)×
-(-162)÷
353
772
1447×
[5-(-1)3]
683
-5n+(9n-4)9n-(8n+4z)-(3z+n)
-2(5b-2)-3b7-(6n+3)-(2n-6)
6(-ab+8a)-(9a+5b)2(abc+3a)+6(4a+3abc)
7(xy+6z)+(-xy-2z)-7(pq+pr)-(7pq-pr)
—x-—=—0.6x-0.8=9.4-3.9x
989
41
—+9x=3+—x2(x-7)-6(x+3)=1
35
—(4x+2)=—x+26x+8(15-x)=-8
y+2y+2
——=4-——3.5x-8(x-2)=30
35
—(2+4x)=—(2x+5)5(6x+5)=1
39
2
1—,-1,0,-6.4
-—,-11,-7,6
1—,0.2,10,0.64
(1)-12与5
(2)-3.75与1.25(3)|-7.9|与|0|
(4)-—与-—(5)19与-|-2|(6)|-88.1|与|-7.6|
63
11
9-—-—20×
(-4)-7×
(-4)
312
734
(---)×
-(-72)÷
4×
(-24)
843
114
1201×
[8+(-5)2]
385
8n-(3n-5)n-(2n-2c)+(8c-6n)
8(5b-9)-2b2-(6m-5)+(5m-3)
2(-ab-3a)+(8a+5b)7(abc+2a)-3(8a+3abc)
9(xy-5z)+(-xy+7z)-9(pq-pr)+(6pq-pr)
—x-—=—0.9x+0.6=1.9+2.8x
81
—-4x=9-—x6(x+2)+2(x+1)=11
98
—(6x+8)=—x-14x+6(5+x)=-2
y-1y+1
——=8+——1.5x-4(x+9)=50
—(5+2x)=—(5x-1)9(9x+8)=10
57
-4—,-4.5,0,0.8
—,8.5,-18,1.8
-2—,-2.75,-5,0.8
(1)-12与-3
(2)-2.75与-0.75(3)|-4.2|与|-1.8|
(4)-—与-—(5)-13与-|-4|(6)|-55.4|与|-8.5|
95
513
8+—-—28×
(-1)+4×
(-1)
618
583
-(-138)×
474
615
-(—+—-—)×
2943×
[6-(-1)2]
776
3a+(5a-6)9a-(6a-9c)-(9c-7a)
-8(5s-4)+4s10-(4b+9)+(3b-10)
7(-ab+8a)-(8a-3b)14(abc+3a)-3(6a-8abc)
2(xy+4z)-(-xy+7z)-4(pq+pr)-(4pq+pr)
—x+—=—0.9x+0.5=4.3-4.6x
663
—-6x=3+—x2(x-4)+7(x-9)=18
—(8x-6)=—x+32x+4(5-x)=-3
55
y-3y-3
——=6+——0.5x+7.5(x-2)=10
25
—(1-2x)=—(5x-4)8(6x+3)=17
69