七年级数学上册精品天天练86Word下载.docx
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5、计算。
71
1+—+—7×
(-15)+10×
(-15)
315
315
(-+-)×
-(-180)÷
8÷
474
782
-(—-—-—)×
1266×
[9+(-2)3]
673
6、合并同类项。
5x-(4x-5)x+(7x+8z)-(7z+9x)
-7(5n-4)+6n2-(2m-7)+(4m+3)
7(-ab+8a)+(4a-7b)10(abc+5a)-5(6a+5abc)
5(xy-7z)-(-xy+9z)-7(pq+pr)-(2pq-pr)
7、解方程。
5x1
—x+—=—0.1x+0.6=4-3x
669
21
—+8x=5+—x6(x+6)-6(x+8)=17
58
13
—(5x+1)=—x+45x+5(17+x)=-9
55
y-1y+2
——=4-——3x+2(x+7)=20
26
12
—(3+2x)=—(3x+1)2(2x+9)=9
39
-1—,2.5,0,-5.6
-—,-9.5,-11,0.3
8
-1—,4,-8,-0.08
(1)-18与4
(2)-3与-0.25(3)|-4.2|与|2.8|
(4)-—与-—(5)-14与-|-7|(6)|-77.8|与|-6|
95
713
2-—+—19×
(-1)+26×
(-1)
358
(---)÷
-(-120)×
16×
(-18)
467
397
-(—-—+—)×
2568×
[6-(-5)3]
488
-3y-(4y+1)4y+(5y-4s)-(9s+y)
6(3t+4)-7t8-(3m+7)-(7m+1)
3(ab-9a)+(7a-2b)14(abc+3a)+7(6a+8abc)
2(xy+2z)-(-xy-6z)-7(pq+pr)+(7pq+pr)
7x1
—x-—=—0.6x-0.9=3-4.3x
349
41
—-2x=1+—x8(x-4)-6(x-6)=12
32
11
—(9x+2)=—x+66x+4(2-x)=-9
75
y-3y+3
——=1-——2.5x+5.5(x+7)=25
45
—(5+3x)=—(3x-1)2(9x+3)=19
5—,-3,0,-6.4
-—,-25,10,1.8
3
-6—,0.5,3,-0.64
(1)-12与-3
(2)-4与0.25(3)|-9.9|与|0.1|
(4)-—与-—(5)-5与-|-5|(6)|-89.9|与|-1.1|
59
11
6-—+—30×
(-12)-25×
(-12)
312
112
(-+-)÷
-(-60)÷
6÷
(-9)
643
111
-(—+—-—)×
969×
[19-(-5)3]
843
3m+(2m-3)2m+(9m+5q)-(9q+4m)
6(4t-3)+2t2-(9y+1)-(7y+6)
4(-ab+4a)-(7a+7b)5(abc+4a)+9(7a+9abc)
7(xy-7z)-(-xy-8z)-2(pq+pr)-(5pq-pr)
—x+—=—0.4x+0.2=3.2+9.5x
629
81
—+7x=5+—x3(x+4)-7(x-4)=3
34
—(2x+4)=—x+49x-9(20-x)=-8
35
y-3y-1
——=8+——4x+9.5(x+8)=50
—(4+2x)=—(5x-3)8(4x-2)=1
79
3—,-1.5,0,3.2
—,-13.5,1,8.5
5—,-1.45,-7,-0.24
(1)-16与-3
(2)-4.75与1.25(3)|-4|与|2.8|
(4)-—与-—(5)13与-|-5|(6)|-19.9|与|-5.5|
85
77
8+—-—24×
(-7)+3×
(-7)
912
152
-(-60)×
10÷
(-27)
576
1607×
[19-(-3)2]
485
9b-(5b+9)3b-(5b+9s)+(3s+b)
9(4n+3)+6n3+(7x-2)+(8x-5)
5(ab-5a)+(3a+6b)4(abc+8a)-9(7a-9abc)
4(xy-2z)+(-xy+4z)-2(pq+pr)-(3pq+pr)
—x+—=—0.4x-0.5=4.8+1.2x
686
—-9x=8+—x8(x-4)+9(x+1)=4
—(2x-5)=—x+87x+3(8+x)=-9
45
y-3y+2
——=2-——1.5x+8.5(x+3)=10
46
—(3-2x)=—(5x-3)9(2x-6)=15
69
5—,-2,0,-6.4
-—,16,-20,8.7
4—,-3.8,6,-0.8
9
(1)-9与8
(2)-2.75与1.25(3)|-9.5|与|-2|
(4)-—与-—(5)-7与-|-4|(6)|-22.5|与|-2.1|
25
7-—+—16×
(-2)-12×
(-2)
612
264
-(-84)÷
8×
(-24)
373
691
1209×
[9-(-4)2]
583
-6m+(4m+9)3m+(6m-5d)-(8d+4m)
6(8a+4)+2a3+(2a+4)-(7a+4)
4(-ab-9a)-(9a+6b)16(a