人教版七年级数学上册计算精品天天练21Word下载.docx
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2+—-—21×
(-19)-22×
(-19)
912
114
(-+-)÷
-(-96)×
10÷
(-24)
753
666
-(—-—+—)×
3432×
[10+(-4)2]
777
6、合并同类项。
8m-(4m-7)4m-(2m-3c)+(4c+m)
3(4a+8)-2a10+(8a+5)+(6a-1)
8(-ab-3a)-(6a+3b)15(abc+2a)+5(3a-3abc)
6(xy-3z)-(-xy+7z)-8(pq-pr)-(9pq-pr)
7、解方程。
5x1
—x+—=—0.6x+0.7=4.3-2.5x
943
21
—+6x=1+—x5(x-3)+7(x+4)=7
98
12
—(7x+2)=—x+53x-9(2+x)=-8
25
y-2y-1
——=5+——3.5x+1.5(x-6)=25
26
—(5+4x)=—(2x-4)3(8x+9)=10
79
2
-1—,-4.5,0,-7.2
-—,15.5,7,-1.3
7—,1.4,-2,-0.08
7
(1)-18与6
(2)-4.75与1.5(3)|-4.6|与|0.9|
(4)-—与-—(5)10与-|-4|(6)|-28|与|-6.4|
85
713
9+—+—27×
(-12)-26×
(-12)
318
647
(---)÷
-(-84)×
12×
(-27)
756
511
649×
[16+(-5)3]
444
-8n-(8n-5)5n-(5n-8q)+(3q+2n)
5(9a-9)+9a4-(7b+1)-(3b+9)
7(-ab+6a)+(7a-6b)12(abc-5a)-4(3a-4abc)
8(xy-5z)-(-xy-9z)-9(pq-pr)+(2pq-pr)
7x1
—x-—=—0.7x+0.8=9.1+1.8x
929
—+7x=2-—x6(x-8)-7(x+9)=5
37
11
—(6x+5)=—x-19x-4(12+x)=-5
55
y+2y-2
——=3-——5x-5(x-8)=25
—(4-2x)=—(4x+3)8(4x+8)=7
3
4—,-2.5,0,-1.6
—,21.5,-14,-4
-9—,2.9,10,0.16
(1)-15与-6
(2)-3.5与2.5(3)|-5.3|与|1.9|
(4)-—与-—(5)18与-|-7|(6)|-26.2|与|-0.8|
93
6+—-—26×
(-2)-17×
(-2)
612
678
-(-150)×
2÷
(-9)
587
318
842×
[12+(-1)2]
437
6x-(2x+7)5x-(7x+2s)-(4s-x)
-8(7a+7)+5a7+(8n+7)+(5n+10)
7(-ab-5a)+(4a-7b)13(abc+9a)+8(6a-3abc)
5(xy-4z)-(-xy-6z)-4(pq-pr)+(3pq+pr)
—x+—=—0.3x-0.2=3.6-4.7x
926
41
—+2x=3-—x3(x+4)+2(x-4)=11
96
14
—(4x+1)=—x+18x-9(20-x)=-2
65
y-2y-2
——=4+——1.5x-9(x+2)=20
46
—(2+3x)=—(3x+2)7(4x+4)=19
35
2—,-4,0,-0.8
-—,-13,-2,8.7
-4—,2.2,4,0.16
(1)-11与2
(2)-2.5与-1.5(3)|-7|与|1.5|
(4)-—与-—(5)11与-|-8|(6)|-25|与|-3.8|
49
77
8+—+—7×
(-17)+1×
(-17)
574
-(-114)÷
6÷
(-18)
465
515
-(—-—-—)×
1447×
[19-(-4)3]
646
-8y-(7y-3)y-(4y-5d)+(9d-y)
-2(2t-5)-3t9-(4m+7)+(8m-10)
9(ab+6a)-(6a+4b)17(abc+5a)+9(7a+9abc)
5(xy+7z)-(-xy+7z)-2(pq-pr)+(3pq+pr)
—x-—=—0.8x-0.8=3.7-7.3x
389
—-9x=3-—x4(x-7)-9(x-2)=18
33
—(4x-6)=—x-49x+6(16-x)=-6
y+1y+3
——=5-——1.5x-8(x-9)=10
36
—(5+2x)=—(5x+1)6(9x+4)=16
93
5—,-3.5,0,5.6
-—,-4,-11,4.4
6
-6—,-3.1,6,0.64
(1)-16与-7
(2)-4.75与-0.75(3)|-9|与|3.6|
(4)-—与-—(5)-5与-|-7|(6)|-95.4|与|-9.4|
33
11
4+—+—22×
(-10)-8×
(-10)
315
161
(-+-)×
-(-102)÷
12÷
655
544
602×
[5-(-3)3]
453
-6n-(2n-7)4n-(8n+4q)+(9q+4n)
2(7n+9)+7n8+(6a+8)-(8a+1)
8(-ab+5a)+(8a-9b)2(abc+8a)+9(4a+3abc)
3(xy+4z)-(-xy-7z)-3(pq-pr)+(4pq+pr)
—x+—=—0.9x+0.6=2.1-0.3x
369
81
—+3x=7+—x9(x+2)+5(x-8)=13
34
—(2x-8)=—x+17x+2(10+x)=-3
y+3y+1
——=6-——2.5x+9(x-4)=40
45
—(3+3x)=—(5x+3)2(6x+1)=13
63