人教版七年级数学上册第一单元有理数复习题精选69文档格式.docx
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人教版七年级数学上册第一单元有理数复习题精选69文档格式.docx
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(-100)(-2)2÷
5+(-2)3×
2
1×
(-—)÷
(-6)×
(-6)(1+0)÷
23÷
(6+2)
(-1)÷
5×
(-—)+(-9)-(1+6)-22+(4+7)
5、用科学记数法表示下列各数。
-1600-3000007700-7910000000
20012000005200-869000
6、下列用科学记数法写出的数,原来分别是什么数?
-6×
1084×
1077.7×
107-1.8×
106
-5.2×
108-2.89×
1037.6×
1044.77×
7、用四舍五入法对下列各数取近似数。
0.0000954(精确到万分位)7.136(精确到个位)
0.94732(精确到0.1)0.0575(精确到0.001)
8、计算。
5+|4||4-(-1)||-5|+(-9)
—3.5,-4,0,1.75,-1.25,-3.2,-0.1.
2、已知x是正数,并且-7<
2,在数轴上表示x所能取得的所有数值。
2
-—-6.5,-3.5,0,0.5,0.75,-0.2,3.4.
3
-800-850-22-(-34)-65+90
-46-(-15)-10÷
(-29)-10÷
(-27)
-—×
182÷
(-11)7×
(-22)
7÷
(-—)(-4)×
(-0.4)-(-9.5)×
30
12×
30×
(-1.4)×
(-0.95)(-1)3÷
2-(-3)2×
7
2÷
(-—)+(-5)×
(-3)(8+6)-32×
(3+1)
(-9)-7×
(-—)+(-5)(9+5)×
13÷
(5+5)
-190020088000000-9030000000
-600002100005500000-602000000
-3×
102-6×
1043.7×
105-5.72×
107
3.8×
1029.39×
107-9.6×
1041.05×
105
0.000888(精确到万分位)64304.8(精确到个位)
0.145203(精确到0.01)0.00669(精确到0.01)
-9+|-2||-5+(-4)||-8|+(-6)
-—4.5,-5,0,3.25,-1.75,-1.4,-2.4.
2、已知x是正数,并且-6<
6,在数轴上表示x所能取得的所有数值。
—-10,7.5,0,0.5,-0.25,-4.4,-0.4.
-600-2005-(-93)-70-10
34-(-39)-6×
(-13)-5+(-21)
6-2+(-8)9×
5÷
(-—)(-20)×
(-1.4)+(-0.95)×
15
-4×
0.2×
(-80)×
(-3.5)(-4)3×
5+(-3)2÷
8
6×
(-3)-(-2)(4+2)+42-(2-7)
(-8)÷
(-8)(6-1)÷
23+(8+6)
10000-7000540000-8410000000
300000450000000420000-4990000
9×
1045×
1067.2×
1023.57×
102
3.1×
1044.67×
1062.2×
1079.73×
0.000572(精确到万分位)6.94856(精确到个位)
56.9184(精确到0.001)0.00956(精确到0.001)
8-|-6||-6+(-3)||-6|+(-3)
-—5,-5.5,0,0.25,-2.75,-1,-3.4.
2、已知x是正数,并且-5<
7,在数轴上表示x所能取得的所有数值。
-—-9,-9,0,-1.25,-1,5.6,0.6.
-400+25054+(-91)-75+20
-31+(-14)5÷
(-13)8+(-7)
—+4-2-(-15)1+(-19)
7×
(-—)(-200)×
(-20)+(-5)×
35
200×
80+(-1.8)÷
(-20)(-4)3÷
6+(-1)3÷
(-—)×
(-3)÷
(-9)(4-2)-12-(1+2)
(-4)-2÷
(-—)-(-3)(8-1)÷
(0+2)
80001000000072000-166000
10000000-40006200-4890000000
1×
1057×
1049.6×
1068.05×
-1.2×
1059.59×
106-1.1×
1053.83×
0.0000506(精确到万分位)82.8879(精确到个位)
5.57434(精确到0.1)0.0719(精确到0.01)
5-|-6||5+(-5)||-6|+(-9)
—6,-4.5,0,2.75,-2,-0.8,-2.7.
—-9,-6.5,0,-1.75,-0.25,-2.8,-3.9.
-100+65049+(-38)-75-60
39-(-46)10÷
(-7)7+(-25)
-—-20-8+(-5)-2÷
(-2)
9÷
(-—)(-12)×
(-100)+(-8)×
450
0.4×
(-1.2)+(-3.5)(-4)2÷
2+(-2)3×
3
3÷
(-—)+(-1)+(-2)(4+9)×
32-(5+0)
(-5)+6÷
(-5)(9-8)×
13+(1+8)
1600007000095000000-80700
-1300000240000000140000-8240000000
-8×
103-3×
1082.5×
1067.75×
7.3×
1044.16×
1044.5×
1045.94×
0.000684(精确到万分位)2.1501(精确到个位)
0.772813(精确到0.1)0.078(精确到0.001)
-8-|6||5-(-3)||-3|+(-1)
-—6,-6.5,0,3.25,-2.75,-0.2,-1.
2、已知x是正数,并且-4<
—-9,9,0,2.25,3,5.6,-3.
-550-25031-(-48)-10+90
-21-(-35)-5×
(-3)-10-(-11)
—+77+(-17)-1-(-23)
8×
(-—)(-14)×
(-140)-(-7.5)×
25
2×
90+(-20)÷
(-5.5)(-4)2×
6+(-3)2÷
5
(-4)÷
(-2)-(3-6)+23-(9+8)
(-—)+(-6)(2+0)-22×
(7-5)
-1300007000037000-7330000000
800-240000008300000-5000000000
105-1×
103-8.2×
105-7.13×
103
-9.4×
104-5.78×
107-4.4×
106-2.51×
0.0000722(精确到万分位)9.34942(精确到十分位)
6.44706(精确到0.1)0.0846(精确到0.1)
2-|-3||7-(-2)||-8|-(-7)
-—5.5,-6,0,1,-2.25,-1.4,-3.
0,在数轴上表示x所能取得的所有数值。
—6.5,-8.5,0,0.25,0.75,3,1.7.
-200-95054+(-43)-35+35
-27+(-2)5×
(-22)3-(-17)
—×
56-6×
(-30)8×
(-16)
(-40)+(-0.6)×
150
8×
2-(-0.6)×
(-9)(-4)3×
3-(-3)2×
(-—)+(-1)+(-6)-(3+7)÷
42×
(6-2)
(-8)×
3×
(-8)-(7+7)+13-(2+1)
-4000000900000040000-392000000
5000000-17000043000000-66000
103-4×
105-7.3×
104-3.51×
2.1×
1023.01×
1085.8×
107-9.51×
108
0.0000793(精确到万分位)124.519(精确到个位)
5.62949(精确到0.001)0.0712(精确到0.1)
-3-|-8||-3-(-2)||-4|+(-8)
-—4,-6,0,3,-1.5,-0.8,-1.1.
-—-4.5,-9,0,-0.5,0.5,-7,3.2.
-850+60013-(-84)-25+65
36+(-12)3×
(-15)3+(-19)
305+(-16)5+(-5)
(-—)(-1.2)×
(-20)÷
(-95)×
0.8×
50÷
(-4)+(-7)(-2)3×
6+(-4)3×
4
(-1)(6-3)+42+(7+6)
(-4)+8×
(-—)+(-8)(3+2)÷
12-(1-8)
-1000000010000290000-9720000000
10000-460022000000-620000
3×
108-3×
1088.5×
1053.63×
-9.9×
106-6.56×
103-1.8×
1028.92×
0.0000758(精确到万分位)91895.5(精确到个位)
80.937(精确到0.01)0.0752(精确到0.001)
6+|2||7-(-3)||-6|-(-5)
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