1. Place Value:
Number Forms
Comparing/Ordering
Estimation

2. 4th
Grade Places
• 4th
Graders are responsible for knowing the ten-
thousands to the hundredths places.

3. Number Forms
25,879
• Expanded Form:
Shows the value of each place
20,000 + 5,000 + 800 + 70 + 9
• Word Form:
Twenty-five thousand, eight hundred seventy-
nine
• Standard Form: 25,789

4. Tricky Questions
342
• What is the digit in the ten’s place?
answer: 4
• What is the value of the digit in the ten’s
place?
answer: 40
• How many tens are in this number?
answer: 34

5. Comparing Numbers
1,456 > 1,446
692 < 765

6. Ordering Numbers
• Our 4th
Grade Process: Organize & Order
Example
• Order the following numbers from least to greatest:
4,565; 4,656; 5,454; 4,665
Organize Order (least to
greatest)
4,565 4,565
4,656 4,656
5,454 4,665
4,665 5,454

7. Estimation
• Use your rounding skills:
– Find the place you are rounding
– Look at the digit to the right. If it’s:
• 5 or more, round up
• 4 or less, stay the same
– The rest of the digits on the right change to zero
• Or, use your own strategy!

8. Estimation
• Key Vocabulary:
About, Approximately,
Estimate, or Reasonable Answer
• Remember, estimation means:
– Round firstRound first
– Then solve the problem

9. Estimation
Examples:
386 → 400 32 → 30
- 112 → - 100 x 18 → x 20
300 600

10. Estimation
Examples:
386 → 400 32 → 30
- 112 → - 100 x 18 → x 20
300 600