1. Place Value/ Rounding
Lesson #1

2. Reading and writing a decimal #
8.59

3. Standard Form
The full number
The way you “normally” write a number

4. What is the standard form of these expanded form numbers:
1) =
2) =
3) 1000x x5 + 1x3 =
4) 100x9 + 1x8 + 1/10x5 =

5. Expanded Form Writing a number showing the total value of each digit
Example: 543
100 x 5 = 500
10 x 4 = 40
1 x 3 = 3
So 543 =

6. Expanded Form: Practice
Complete the expanded form of the following numbers:
1) 384 = _______ _______
2) 6257 = ________ + ______ + ______
3) 37 = 10x3 + ________
4) 4826 = ________ + 100x8 + _______ + _____
5) = ______ + _______ + ______ + ______

7. Exponential form Place Value Number Exponential version Thousandth
0.001
Hundredth
0.01
Tenth
0.1
Ones 1
Tens 10
Hundreds
100
Thousands
1000
Ten Thousand
10 000
Hundred Thousand
Millions
Ten Millions

8. Exponential practice Write the following numbers in exponential form.
67.34

9. Rounding rules:
Find the number in the place value you are asked to round to (ones, tens, hundredths)
Look at the number to the right.
If its 4 or less round down.
If its 5 or more round up.

10. Examples Nearest tens: 1265 Nearest hundreds: 957
Nearest thousandths .3472
Nearest tenths .34