人教版七年级数学上册科学记数法和近似数综合练习题精选12文档格式.docx
《人教版七年级数学上册科学记数法和近似数综合练习题精选12文档格式.docx》由会员分享,可在线阅读,更多相关《人教版七年级数学上册科学记数法和近似数综合练习题精选12文档格式.docx(26页珍藏版)》请在冰豆网上搜索。
![人教版七年级数学上册科学记数法和近似数综合练习题精选12文档格式.docx](https://file1.bdocx.com/fileroot1/2022-11/18/2b50ec37-cea2-475c-a184-0d3709d48273/2b50ec37-cea2-475c-a184-0d3709d482731.gif)
107-3.29×
105
3、用四舍五入法对下列各数取近似数。
0.000549(精确到万分位)0.322152(精确到个位)
37.0192(精确到0.01)0.0098(精确到0.001)
4、计算。
1
(-—)3(-2)2(-3)232
4
7007000140000-17600000
1700000-44007400000-400000000
8×
1065×
102-8.9×
1058.33×
104
-8.9×
108-5.55×
1058×
1056.54×
0.000764(精确到万分位)25.2127(精确到十位)
64.3287(精确到0.01)0.0738(精确到0.001)
(-—)3(-7)3(-4)212
2
-90070091000-9580000
-120000-4800000008300000-8880000
-7×
108-6×
1088.1×
1064.19×
106
-9.5×
105-8.1×
1039×
1074.15×
103
0.000667(精确到万分位)32.4818(精确到个位)
0.652051(精确到0.01)0.00873(精确到0.01)
6
(-—)3(-8)3(-2)462
5
900000-600002500-85300
1200500002000000-19000000
5×
105-2×
108-1.1×
1084.12×
-9.2×
107-8.93×
103-3.7×
106-4.41×
107
0.000571(精确到万分位)13.4755(精确到十位)
0.57194(精确到0.1)0.00639(精确到0.01)
3
(-—)2(-5)2(-3)372
1200000100900000-154000000
-1800100046000000-38800
-5×
1026×
1073.2×
1023.65×
-1.2×
1086.95×
107-1.8×
104-5.97×
0.0000605(精确到万分位)7.52575(精确到个位)
0.618809(精确到0.01)0.0878(精确到0.001)
(-—)2(-9)3(-3)252
10000000-30000068000000-752000000
12000000-500009000000-2650000
9×
103-9×
102-4.5×
1034.34×
-7.1×
1027.32×
1023.7×
1075.95×
102
0.000835(精确到万分位)0.739165(精确到十分位)
0.117503(精确到0.001)0.00786(精确到0.001)
(-—)2(-9)2(-3)2103
500000100000055000000-550000
70000-500000002500-9000
4×
1071×
1044.6×
105-5.29×
108-8.27×
1085.8×
105-5.41×
0.000696(精确到万分位)2791.97(精确到十分位)
6.30581(精确到0.001)0.00685(精确到0.01)
(-—)2(-2)3(-4)392
-1000040009600-828000000
30019000049000000-2700000
6×
102-3.6×
108-3.78×
8.5×
1054.72×
104-3.2×
1079.51×
0.000855(精确到万分位)4038.1(精确到十分位)
2.43979(精确到0.001)0.00888(精确到0.001)
(-—)3(-9)3(-3)463
13000800014000000-79600
1400-19000037000000-59700
7×
106-9×
106-2.4×
1077.05×
1024.99×
1034.7×
105-4.68×
0.0000993(精确到万分位)52.6901(精确到十分位)
1.28687(精确到0.001)0.0941(精确到0.001)
(-—)3(-1)2(-1)333
6000000-30049000000-3790000000
20000-1008900000-49600000
2×
1027×
105-8.8×
107-1.27×
-7.2×
1023.8×
104