人教版七年级数学上册第一单元有理数复习题精选34Word下载.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34Word下载.docx
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(-—)-(-4)+(-7)-(6+2)+12+(5-4)
2
(-4)÷
5÷
(-—)-(-7)(2+4)÷
42+(4-9)
5、用科学记数法表示下列各数。
90000-50000009000-63000000
90000005000098000-2460000000
6、下列用科学记数法写出的数,原来分别是什么数?
1×
102-8×
1068.6×
103-6.14×
108
-2.7×
1034.17×
1085.2×
1033.11×
105
7、用四舍五入法对下列各数取近似数。
0.0000702(精确到万分位)943.568(精确到十分位)
4.76819(精确到0.1)0.0686(精确到0.001)
8、计算。
-9+|4||-5+(-5)||-4|-(-3)
-—6,-5.5,0,2.25,-1,-0.4,-1.2.
—-6,-5,0,0.25,-2.25,7.6,0.6.
-450-95032-(-32)-90+5
31-(-49)5÷
(-23)-1×
(-9)
-—-4-4-(-16)-9×
(-7)
5×
(-—)(-0.4)×
(-140)÷
(-5)×
16×
20+(-200)-(-4.5)(-3)2÷
4+(-4)3÷
2
(-—)-(-3)-(-8)-(5-5)+23+(4-7)
7
(-9)-4÷
(-—)+(-2)(4+1)+13+(3+5)
-1600009000053000-204000000
70002900046000-9090000
-7×
1039×
1068.5×
108-9.17×
107
5.9×
1081.09×
107-8.8×
1064.05×
0.0000898(精确到万分位)0.166145(精确到十位)
1.52248(精确到0.1)0.0755(精确到0.1)
-5+|-6||-2-(-1)||-7|-(-4)
—5,-6,0,2.5,-2.75,-1.2,-2.5.
2、已知x是正数,并且-2<
-—-9,-4.5,0,3.25,1.75,0.8,-1.6.
-450-850-93+(-59)-5+5
-45-(-20)-10÷
(-28)-3-(-18)
-—-81-3×
(-22)10×
(-18)
9
2÷
(-—)(-100)×
(-8)×
(-5.5)×
350
-20×
50×
(-0.25)(-4)3×
4+(-4)3×
7
1×
(-—)÷
(-3)+(-6)(6+1)÷
42÷
(9-7)
(-6)÷
8÷
(-—)-(-5)(1-6)+32+(6-1)
3000006000430000-397000000
-2000000-460000009800-717000
-4×
102-4×
102-1.7×
104-5.02×
103
-6.6×
107-3.21×
104-3.1×
1082.5×
102
0.000771(精确到万分位)446.319(精确到个位)
96.6018(精确到0.001)0.0953(精确到0.001)
3-|2||4+(-3)||-4|-(-4)
-—6.5,-4,0,2.5,-1,-0.4,-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。
—6.5,-5,0,-2.25,-1.75,-5.4,0.2.
-750+250-84+(-37)-75+10
8-(-13)-5÷
(-17)-2-(-19)
—-407+(-29)10+(-1)
3×
(-—)(-20)×
(-20)×
(-85)×
50
14×
0.4×
(-4)×
(-3)(-1)3×
5+(-3)3×
5
(-8)+(-4)-(2+4)+32×
(3-1)
(-2)×
3÷
(-—)×
(-5)(2-4)×
33-(4-3)
6000000-600000009700-237000
200001500010000-45600000
6×
1069×
1057.2×
1054.41×
3.4×
103-8×
1078.6×
1038.79×
0.000667(精确到万分位)8.83498(精确到十位)
85.4839(精确到0.001)0.00897(精确到0.1)
-7-|-8||-8-(-3)||-8|-(-6)
—5,-3.5,0,0.5,-2.75,-1.2,-2.5.
7,在数轴上表示x所能取得的所有数值。
—-5,-7,0,2.75,0.75,-3,-0.4.
-300+90013+(-72)-15+50
-9-(-18)-4×
(-14)-9+(-13)
-—+27-8×
(-13)-4÷
(-1)
4÷
(-—)(-120)×
(-2)-(-70)×
1.8×
7×
(-2)-(-0.5)(-2)2÷
4-(-2)3×
6
(-—)+(-1)-(-3)(7-9)+32-(1-1)
8
(-9)-3÷
(-—)+(-5)-(4-0)-43÷
(0-9)
-1700000-6009000000-3270000000
150000-50000056000000-39100000
-1×
105-2×
107-3.7×
1043.01×
-5.7×
1038.91×
1038.3×
1028.17×
0.0000676(精确到万分位)356.907(精确到个位)
0.269297(精确到0.1)0.00789(精确到0.01)
-8+|-3||-6-(-1)||-7|+(-6)
—6,-6,0,3,-3.25,-1,-2.
2、已知x是正数,并且-1<
—5,-5,0,-2.75,2.25,7.6,2.9.
-700+200-41-(-50)-75-95
5+(-27)-5÷
(-10)9+(-18)
-—×
645×
(-15)6-(-2)
9÷
(-—)(-0.6)×
(-12)+(-0.45)×
400
10×
80+(-2)×
(-0.2)(-1)3×
2-(-1)2÷
7÷
(-7)-(-4)(4+3)÷
22÷
(4-6)
(-3)+4×
(-—)-(-4)(5+1)×
42-(8-7)
11000000700008200-9760000
30000002100110000-240000
1085×
107-5.6×
103-6.54×
7.4×
105-1.4×
105-5.3×
104-3.08×
0.000063(精确到万分位)4.3985(精确到十分位)
0.400417(精确到0.1)0.0985(精确到0.001)
3-|2||-1-(-2)||-3|-(-1)
—4.5,-5,0,0.25,-2.75,-2.2,-1.9.
2、已知x是正数,并且-4<
1,在数轴上表示x所能取得的所有数值。
-—-6,-6,0,-0.5,0.25,-8,2.2.
-450+100-49-(-54)-10-10
-27+(-46)-10÷
(-19)8-(-13)
—+634÷
(-27)6-(-15)
(-—)(-140)×
100
70-(-180)+(-8.5)(-2)3÷
6-(-2)2÷
(-2)(4-9)÷
43-(9+6)
(-3)+6×
(-6)-(5-1)+42×
(9+9)
50000-5000000068000000-2520000000
90000200008500-18000
8×
103-4×
102-6.6×
103-1.43×
-7.1×
107-2.15×
1063.5×
1067.13×
0.0000884(精确到万分位)8464.23(精确到十位)
10.1964(精确到0.01)0.0958(精确到0.001)
6+|-3||1+(-8)||-7|-(-4)
—5.5,-5,0,1,-0.5,-2.4,-1.7.
2、已知x是正数,并且-6<
-—-9,-4,0,-0.5,-3,2,2.2.
-250+2507-(-87)-75-60
4+(-2)-8×
(-22)-5÷
(-3)
-—-37÷
(-11)2-(-1)
(-—)(-40)×
(-8)÷
(-80)×
30
-120×
(-80)÷
(-0.75)(-3)3×
2+(-1)2÷
8
(-4)+(-6)(0+7)-43+(8-5)
(-9)×
(-—)-(-1)-(2+1)÷
43-(7+7)
8000000500810000-105000
-17000003200008900000-601000
9×
107-4×
1064.9×
1046.03×
104
6.2×
104-6.45×
106-2.9×
108-4.87×
0.0000981(精确到万分位)8022.81(精确到个位)
3.75536(精确到0.01)0.00761(精确到0.001)
2+|-4||4+(-5)||-1|+(-4)
1
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