Year 2 Lesson 2 Homework Page 2
Write the following in scientific notation using powers of 10:
12). 920,000 = ____ x 10 ____ |
13). 8,800,000,000 = ____ x 10 ____
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14). 15200 = _____________ |
15). 88 = ______________ |
Write the following as decimal numbers:
16). 9.2 x 103 = _____________ |
17). 6.6 x 107 = ______________ |
Scientific notation is used in science to describe really big and really small numbers. Here are some scientific facts. Write the numbers as whole numbers (with zeroes ). Write small.
18). 18). The mass of the earth is approximately 6 x 1024 kilograms. (really heavy!) Write this as a decimal.
    6 x 1024 = ___________________________
___________________________
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19). Now that you see what the mass of the earth is in decimal form, can you see why scientists use scientific notation? (check one box)
Yes __ No __ Maybe! __ |
Doing arithmetic with scientific notation: Do the indicated arithmetic and then express the answer as a decimal: (Use your calculator)
Multiply: (Multiply the coefficients and add the exponents)
20).   4.4 x 104 x 1.8 x 103 = ____ x 10 ___
In decimal: ____________ |
21).   6.5 x 10-4 x 1.3 x 103 = ____ x 10 ___
In decimal: ______________
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Divide: (Divide the coefficients and subtract the second exponent from the first)
22).   5.6 x 104 ÷ 7 x 103 = ____ x 10 ___
In decimal: ____________ |
23).   5.1 x 104 ÷ 1.7 x 10-3 = ____ x 10 ___
In decimal: _____________
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Add: (Rewrite making the exponents the same and then add the coefficients)
24).  2.8 x 104 +     1.2 x 103 =
         2.8 x 104 + ____ x 104 =
_____ x 10 ___
In decimal: ________________ |
25).   2.7 x 102 +   3.2 x 103 =
         2.7 x 102 + ____ x 102 = _____ x 10 ___
In decimal: ________________ |
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