THE DECIMAL SYSTEM
Example:
a)
b)
c)
d)
Write 34,021 in expanded form
Write 34.021 in expanded form
Write 3 x 107 + 2 x 104 + 1 x 100 in decimal form
Write 4 x 102 + 5 x 10-1 + 3 x 10-2 in decimal form
Answers
a) 30,000 + 4000 + 20 + 1
b)
2
1
30  4 

100 1000
c) 30,002,001
d) 40.53
Exercise
Write in decimal form
1) 103
2) 10-3
3) 105
4) 10-1
5) 100
6) 6 x 105 + 2 x 103 + 8 x 101
7) 9 x 106 + 4 x 104 + 6 x 101
8) 5 x 102 + 8 x 100 + 3 x 10-1
9) 8 x 10-1 + 2 x 10-2 + 5 x 10-4
Write in expanded form
10) 805,207
11) 73,005
12) 8052.07
13) 730.05
14) What is the difference between a number and a numeral?