1. Module 3 Lesson 16, 17, and 18

2. Objective Compare two three-digit numbers using, and =. Order numbers in different forms.

3. Sprints Sums-Crossing Ten Put your name and number at the top of the page. Sprint A On your mark, get set, THINK Sprint B On your mark, get set, THINK

4. Story Problem At recess Diane skipped rope 65 times without stopping. Peter skipped rope 20 times without stopping. How many more times did Diane skip rope than Peter?  What do you see?  Can you draw something?  What can you draw? Use your RDW (Re-read, Draw, Write) process. What conclusions can you make from your drawing? Who would like to share what they wrote?

5. Concept Development Use place value disks to show 74 on your place value chart. Which disks did you use from greatest to smallest? Tens and ones.

6. Concept Development Continued Add 1 disk so the number becomes 174. What did you add? A hundred. Which number is greater? 74 or 174? 174! Let’s state that as a sentence. 174 is greater than 74.

7. Concept Development Continued Change your disks to show 105. Which disks did you use from greatest to smallest? Hundreds and ones. Now, make the number 135. Which number is less, 105 or 135? 105. Say it as a sentence. 105 is less than 135. Talk to your partner. How can you tell? Who would like to share their thinking?

8. Concept Development Continued Show 257 on your place value chart. Change it to show 250. Which number is greater, 257 or 250? 257. Say it as a sentence. 257 is greater than 250. How do you know?

9. Pictorial Take two minutes to draw each number using hundreds, tens, and ones. Compare with your partner. How are your drawings alike? Look carefully at our three numbers. Which is greatest? 724! Turn and tell your partner how you know. Turn and tell your partner, why might comparing units help us figure out which number is greatest?

10. Hundreds are the biggest unit. So, if a number has 7 hundreds and the other only has 4, you already know that the one with 7 has to be greatest. If we use this strategy, which number is smallest? 274! Who would like to share how you compare tens? Name just the TENS, and say the three numbers from greatest to smallest. 72 tens, 47 tens, 27 tens. Use the symbols to write a number sentence with all three numbers at the bottom of Problem Set 1. Check your partner’s work. It might look different from yours, but make sure you agree it’s true.

11. Concept Development Partner A, show 124 on your place value chart. Partner B, show 824. Compare numbers. Place a symbol from the set between your charts to make a true statement. Read the statement. 124 is less than 824. Partner A, add 7 tens to your number. Partner B, take 7 hundreds from your number. Compare. Choose the symbol to go between your charts. Read the statement. 194 is greater than 124.

12. Concept Development Continued Partner A, take 4 tens 4 ones from your number. Partner B, add 2 tens 6 ones to yours. Compare numbers. Choose the symbol. Read the statement. 150 equals 150. How many tens in 150? 15! Partner A, show 5 tens 6 ones. Partner B, show 15 tens 6 ones. Compare numbers and place your symbol. Read the statement, naming just tens and ones. 5 tens 6 ones is less than 15 tens 6 ones.

13. Concept Development Continued Partner A, add 7 tens 5 ones to your number. Partner B, take 2 tens 5 ones from your number. Compare numbers and place your symbol. Read the statement naming just tens and ones. 13 tens 1 one equals 13 tens 1 one. Read my number in standard form. 113! Is my number greater than, less than, or equal to yours? Decide with your partner, then draw a symbol. Say the number sentence. Say my number in standard form, and name yours with tens and ones. 113 is less than 13 tens 1 one. 113

14. Write in word form. Write in expanded form. 100 10 1 1 1 1 1 1 1 1 1 1 1 1 Draw a symbol and read. Four hundred six is less than 400 + 30 + 6. Pictorial

15. Pictorial Continued 100 10 Write in standard form. Write in unit form, using only tens and one 100 10 Draw a symbol and read. 920 is greater than 88 tens.

16. Pictorial Continued On your board, add 4 tens after 88 tens. Solve. Change the symbol if you need to. Partner A, show your partner how you solved 88 tens + 4 tens. Partner B, talk to your partner about what happened to the symbol. Read the number sentence.

17. Concept Development Partner A, show 2 hundreds 12 ones on your place value chart. Partner B, show 15 tens 4 ones. Compare numbers with your partner and me. What’s the smallest, or least, number? The greatest? Write the three numbers from least to greatest on your personal white boards. Use standard form. At the signal, show your boards. 100 1 1 1

18. Concept Development Continued Partner A, change to show 62 tens 4 ones. Partner B, change to show 4 ones 6 hundreds. Now, compare. Write the numbers from least to greatest on your boards. 100 10 1 1

19. Concept Development Continued Partner A, change to show 5 + 300 + 30. Partner B, change to show 50 + 3 + 300. Compare our numbers. This time write them from greatest to least on your boards. Show! 533, 353, 335. five hundred thirty- three

20. Concept Development Continued Partner A, change to show 30 tens + 7 tens. Partner B, change to show 29 tens + 8 tens. Compare our numbers. Write them using the symbols, or = to make a number sentence. SHARE! 370 = 370 = 370 three hundred seventy

21. Let’s Practice…