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Middle School Math
Mathematik
Middle School Math
Dezimalzahlen

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Name _____________________________
Date ___________________
Dezimalzahlen
Vergleiche. Schreibe <, >, oder =.
1.  
8.214  _______  8.5830
2.  
5.60  _______  5.500
3.  * Dies ist ein vorgefertigtes Arbeitsblatt.
Verwenden Sie den Link oben auf der Seite für eine druckbare Seite.
4.  
9.53  _______  9.5
5.  
1.80  _______  1.98
6.  
0.94  _______  0.94
7.  
4.89728220  _______  4.89721360
8.  
7.820  _______  7.820

Vergleiche. Schreibe <, >, oder =.
9.  
-11.12  _______  -11.27
10.  
-0.101891  _______  -0.1014460
11.  
-2.4700  _______  -2.470
12.  
9.15  _______  -9.32
13.  
10.887  _______  -10.8870
14.  
-8.528  _______  -8.285
15.  
-3.92380  _______  -3.2839
16.  
-7.0040  _______  -7.002

Ordne die Dezimalzahlen von der kleinsten zur größten.
17.  29.212,29.331,29.865,29.842,29.476
18.  66.29,66.11,66.23,66.41,66.62
19.  28.319,28.7,28.77,28.6,28.3,28.5,28.56
20.  47.00010026,47.000126,47.01026,47.010026,47.001026,47.0010026

Ordne die Dezimalzahlen von der kleinsten zur größten.
21.  -79.78,-79.95,-79.37
22.  -73.6,-73.9,-73.97,73.214,-73.618,73.2
23.  84.004085,84.000485,84.00400085,84.04085,84.0400085
24.  -24.96,-24.096,-24.0096

Rechne Plus oder Minus.
25.  20.56  +  5.82
26.  14.000713  +  7.0223
27.  10.72  -  4.2
28.  29.29  -  18.6

Key #2
Schreibe die Zahlen noch einmal in Exponentialschreibweise.
29.  0.0000000000834
30.  48,000,000
31.  782,000,000,000
32.  0.0002
33.  3,190,000,000
34.  0.00000096
35.  632,000
36.  0.000006

Schreibe die Zahl noch einmal in Dezimalschreibweise.
37.  7.4 x 10-6
38.  4.81 x 10-5
39.  8 x 1011
40.  6.32 x 10-10
41.  8.3 x 106
42.  1.56 x 1010
43.  5 x 104
44.  4.96 x 10-4

Löse nach der Unbekannten auf.
45.  34.67 = 26.502  +  h
46.  e  -  20.00172811 = 3.998759597
47.  13.71 = n  -  9.73
48.  38.74 = 25.93  +  x

Multipliziere. Runde die Antworten auf das nächstliegende Tausendstel.
49.  11.088  x  1.04
50.  3  x  0.6849
51.  9.130  x  11.915
52.  12.459  x  12.8060
53.  9.0024  x  2.009
54.  2.0072

Ganze.
55.  Samantha measured the length of her iguana last month and found it was29.5centimeters long. She measured it again today and found that some of its tail was missing and now it was only 28.47 centimeters long. By how much was the iguana shorter?

56.  Bei dem örtlichen Holzlieferanten kosten unbehandelte Eichenbretter$4.99per board foot. A board foot is a piece of wood 12-in by 12-in by 1-in. How much would an unfinished oak board cost if it was six inches wide, one inch thick and nine feet long?


Key #2
Teile (dividiere)
57.  11.2458  ÷  10
58.  2.838  ÷  8
59.  3.00014  ÷  11
60.  12.2  ÷  4
61.  5.51  ÷  10
62.  10.8  ÷  4

Teile (dividiere)
63.  15.54  ÷  2.1
64.  26.341  ÷  4.97
65.  15.39  ÷  5.7
66.  156.25  ÷  12.5
67.  105.0111  ÷  11.799
68.  40.5298  ÷  10.954

Ganze.
69.  
 (-1.3 - -39 + 2 × 9.2 + -44
70.  
43 + 11.5
71.  
-13.2 - -9 + -105 ÷ -7
72.  
28 + -112.42 ÷ 7.7
73.  
-11 + 10 - 11
74.  
12.4 - 7

Löse.
75.  0.72 = j  ÷  10
76.  43.38 = 9.64v
77.  31.64 = 7e
78.  2.97b = 26.73
79.  10.3 = p  ÷  6.1
80.  k  ÷  3.5 = 11.3
81.  2.523 = y  ÷  2
82.  6.2 = z  ÷  10.1
83.  5.3u = 47.17
84.  8.1 = f  ÷  12.1
85.  0.571 = h  ÷  20
86.  130.2 = 10.5w

Ganze.
87.  Seafloor rocks from a secret area above the Arctic Circle were recently analyzed by Z-Globe. The company had a contract with Spacegov.biz to test the rocks for nickel. Z-Globe found that four samples from the first location were composed of an average of8.37% nickel. Eight samples from the second location yielded an average of8.87% nickel. What was the overall average nickel content of the rock samples? Round your answer to the nearest hundredth. (Remember it is not the average of the two averages.)

88.  Victoria has to add some medicine to her aquarium. Several fish have a fuzzy growth around their mouths. The medicine bottle says to put0.1ml for every gallon of water in the tank. She has a35-gallon tank. How much medicine should she add?


Key #2
Ganze.
89.  Some chemical compounds are so hard to make in the lab that they can only be synthesized in tiny amounts. Professor Sneed has succeeded in making about10picograms of californium hexachloride, an extremely radioactive and unstable compound. After 12 hours, only12% of the compound remains. How much is left? Express your answer in scientific notation and in grams.

90.  A special observatory on a mountain in Siberia monitors the number of meteoroids entering the Earth's atmosphere above the North Pole. It is an automated system that detects the flashes of light caused by their friction with the atmospheric gases. If on average the system detects60per day, what is the estimated annual total number of meteoroids that enter the atmosphere above the pole? Express your answer using scientific notation and assume a non-leap year.


Rechne Plus oder Minus.
91.  28.442224  -  25.755115
92.  25.3  -  23
93.  29.11  +  10.55
94.  22.59  -  17.27

Teile (dividiere)
95.  112.53  ÷  9.3
96.  7.2639  ÷  3.459
97.  61.3916  ÷  6.673
98.  58.42  ÷  12.7
99.  116.39  ÷  11.3
100.  85.12  ÷  7.6

Ganze.
101.  Give two decimals whose product is 70.72 and whose difference is 0.18.





102.  Was ist einfacher, 0,2in einen Bruch oderfive-seventhsin eine Dezimalzahl umzuwandeln?







Answer Key


Sample
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edHelper Abonnenten - Erstellen Sie einen neuen Ausdruck
Die Lösung enthält auch die Fragen
Die Lösung gibt nur die Antworten
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Not a subscriber?  Sign up now for the subscriber materials!

Middle School Math
Mathematik
Middle School Math
Dezimalzahlen

This worksheet still contains English.
edHelper is working on the translation