Subtracting 3-Digit Numbers: Warm-Up, Regrouping & Practice

Subtracting 3-digit numbers with warm-up estimations, regrouping strategies, and practice problems. Dive into word problems involving subtraction to enhance mathematical skills.

• Subtraction
• 3-Digit Numbers
• Regrouping
• Word Problems
• Mathematics

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Uploaded on Feb 28, 2025 | 0 Views

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Presentation Transcript

1. Subtracting 3 Digit Numbers LESSON 3-8 CCSS 3.NBT.1, 2; 3.OA.8

2. Warm Up Estimate, then subtract. 472 386 992 196 1,231 1,187

3. Think and Write Are all numbers easy to subtract? Which numbers are not easy to subtract?

4. Regrouping in Subtraction 33 18 Draw 33 with tens and ones. Can you do 3 8? Why? What can you do? Regroup one ten as 10 ones. Now solve. What is 33 8?

5. Practice! 723 406 388 297 472 198 783 - 595

6. Problem 1 Last year there were 342 houses for sale in Mill County. Of these, 162 were sold. How many of these houses did not sell? Write a number sentence and solve. Use whichever method you prefer.

7. Problem 2 There are 126 lizards at the zoo. There are 78 frogs at the zoo. How many more lizards are there than frogs? Write a number sentence, then solve.

8. Problem 3 The roller coaster Kingda Ka has a drop of 418 feet. Another roller coaster, Superman, has a drop of 328 feet. How much longer is Kingda Ka s drop?

9. Create a Word Problem Write a number story for the subtraction problem 243 189.