人教版七年级数学上册第一单元有理数复习题精选58Word文件下载.docx
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1
—+16-2÷
(-9)7÷
(-18)
8
4÷
(-—)(-2)×
(-0.4)÷
(-3)×
5
-8×
0.8×
(-20)-(-2.5)(-3)3÷
6+(-4)2÷
3
6÷
(-—)-(-4)-(-4)-(0-2)÷
42×
(2-4)
(-1)÷
2×
(-—)÷
(-3)-(1-2)×
23×
(7+8)
5、用科学记数法表示下列各数。
-1000500000540000-16600000
3000800000005100-77800
6、下列用科学记数法写出的数,原来分别是什么数?
5×
107-4×
102-2.6×
106-5.79×
102
-1.7×
1062.06×
102-4.5×
1034.93×
105
7、用四舍五入法对下列各数取近似数。
0.0000905(精确到万分位)888.077(精确到十分位)
2.99667(精确到0.001)0.0599(精确到0.01)
8、计算。
-7+|-8||-2-(-5)||-2|+(-1)
-—4,-4,0,1.5,-0.25,-2.4,-2.3.
2
2、已知x是正数,并且-4<
6,在数轴上表示x所能取得的所有数值。
-—-6.5,3.5,0,0.75,-2.25,4,2.
-950-800-58-(-93)-15+75
4-(-26)-7×
(-1)2÷
-—-99×
(-16)3-(-9)
9
7×
(-—)(-6)×
(-8)×
1.5
1.2×
9×
(-80)÷
(-65)(-1)3×
3-(-4)2÷
3
(-—)-(-8)÷
(-8)-(4+5)×
(7+7)
8×
(-—)×
(-8)-(3+7)×
33+(7+4)
6007000000062000000-25000000
4000220000073000-61600
-2×
1063×
105-5.6×
1051.01×
106
6.9×
1063.34×
1045×
1065.65×
0.000946(精确到万分位)0.301135(精确到十位)
27.8492(精确到0.001)0.095(精确到0.01)
3-|8||-3-(-7)||-5|+(-6)
-—4.5,-3.5,0,3.25,-0.75,-2.4,-1.9.
2、已知x是正数,并且-6<
1,在数轴上表示x所能取得的所有数值。
—4.5,7.5,0,2.5,2,5.8,-1.2.
-750+40068+(-97)-20-45
-33+(-36)-2×
(-18)-9÷
(-22)
—-30-1÷
(-20)-10÷
(-7)
2÷
(-—)(-16)×
(-12)÷
(-65)×
25
1×
30+(-20)×
(-65)(-2)2÷
6+(-3)3×
7÷
(-7)×
(-8)-(7-4)+43×
(0-3)
(-4)+3÷
(-2)-(7-5)×
23+(8+4)
8000000-600000043000-3810000
-30000010052000-782000000
-3×
1029×
1068.8×
1069×
104
-5.5×
1055.67×
1045.9×
103-8.34×
0.000854(精确到万分位)34.2483(精确到十分位)
42.292(精确到0.001)0.00759(精确到0.01)
-2-|3||-3-(-1)||-1|+(-3)
-—5.5,-5,0,1.25,-1.75,-3.6,-1.6.
5,在数轴上表示x所能取得的所有数值。
10
—10,6,0,2.5,-0.25,-5.6,3.1.
-100-750-22+(-83)-65-85
-25-(-22)-1÷
(-5)4-(-10)
-—+242+(-5)-7+(-19)
4×
(-—)(-0.6)×
(-16)÷
(-40)×
2.5
-60×
9+(-8)×
(-90)(-4)3÷
2+(-3)3×
6
(-4)×
(-1)-(2+9)×
43-(9+7)
(-8)-1÷
(-2)-(2-7)×
32+(3-7)
160000-300097000-2760000
800007006000000-90000
3×
104-7×
1081×
1053.62×
1.1×
1047.96×
107-9.5×
107-1.22×
0.000543(精确到万分位)4373.81(精确到十分位)
1.89792(精确到0.001)0.0085(精确到0.001)
6+|1||-7+(-1)||-9|+(-4)