1. COMPARING AND ORDERING DECIMALS Math Unit 1

2. OBJECTIVE B.E.L., We will compare and order decimals to the thousandths place.

3. APK – WHAT DO WE ALREADY KNOW? Decimals show part of a whole. The decimal point separates the ones place and the tenths place. The decimal says the word “and”. The value of a digit is affected by its place in the number

4. APK – CONTINUED… As we move left, each position is 10 times bigger! Example: Hundreds are 10 times bigger than Tens... and... As we move right, each position is 10 times smaller

5. COMPARING DECIMALS To record the comparisons, we use > is greater than < is less than = is equal to

6. COMPARING DECIMALS 1. Line up the decimal points. 2. Start at the left 3. Compare each place value 1.2.037 2.033 2. The 7 in the thousandths place is > than the 3 in the thousandths place. So, 2.037 > 2.033 2.0372.033 >

7. WE DO Look at Example A: We will compare 17.31 and 17.52 Look at Example B: We will compare 14.81 and 13.88 *Using the place value chart helps us to see the place at which these two numbers differ.

8. Let’s go shopping! Remember to be frugal! We are on a budget!

9. Which would you choose? $1.2 $1.02

10. Which would you choose? $39.15 $39.51

11. Which would you choose? $3.1 $3.19

12. Which would you choose? $2.31 $3.01$2.13

13. Great job!

14. 14 Ordering Decimals Place Value 19.48, 19.481, 19.4 19.48 19.481 19.4 Line up the decimal points

15. 15 Ordering Decimals Place Value 19.48, 19.481, 19.4 19.48 19.481 19.4 Annex a zero so that each has the same number of decimal places. 0 00

16. 16 Ordering Decimals Place Value 19.48, 19.481, 19.4 19.48 19.481 19.4 0 00 19.4; 19.48; 19.481