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2. Lesson Menu Five-Minute Check (over Lesson 2–3) Main Idea Example 1:Add or Subtract Whole Numbers Example 2:Add or Subtract Whole Numbers Example 3:Add with Regrouping Example 4:Subtract with Regrouping

3. Main Idea/Vocabulary I will add and subtract multi-digit numbers.

4. Example 1 Add or Subtract Whole Numbers Find 321 + 608. Check Since 929 is close to the estimate, the answer is reasonable. Estimate 321 + 608 300 + 600 = 900 321 608 + 9 321321 608608 + 9 321 608 + 29 2 9 Step 1 Add the ones. Step 2 Add the tens. Step 3 Add the hundreds.

5. 1.A 2.B 3.C 4.D Example 1 A.968 B.979 C.988 D.989 Find 432 + 547.

6. Example 2 Add or Subtract Whole Numbers Find 3,879 – 535. Estimate 3,879 – 535 3,900 – 500 = 3,400 Check Since 3,344 is close to the estimate, the answer makes sense. 535 3,879 – Step 1 Subtract the ones. Step 2 Subtract the tens. Step 3 Subtract the hundreds and thousands. 4 535535 3,879 – 4 535 3,879 – 44 4 33,3,

7. 1.A 2.B 3.C 4.D Example 2 A.4,534 B.4,634 C.4,644 D.4,645 Find 4,788 – 254.

8. Example 3 Add with Regrouping The high school band took a trip to Austin to see The Music Man. The music boosters raised $6,253 for the trip, and students paid the remaining $4,986. How much money did the trip cost in all? Estimate $6,253 + $4,986 → $6,000 + $5,000 = $11,000

9. Example 3 Add with Regrouping $4,986 $6,253 + Step 1 Add the ones. Step 2 Add the tens. Step 3 Add the hundreds. Add the thousands. 9 $4,986 $6,253 + 9 Rename 13 tens as 1 hundred and 3 tens. 3 1 $4,986 $6,253 + 39 1 2$11, 1 Answer: The trip cost $11,239 in all. The answer is close to the estimate. So, the solution is reasonable.

10. 1.A 2.B 3.C 4.D Example 3 A.$12,213 B.$12,412 C.$12,413 D.$13,413 The school raised $5,682 for the seniors to go on their senior trip. The students had to pay the remaining $6,731. How much did the trip cost in all?

11. Example 4 Subtract with Regrouping Find 951 – 787. Estimate 951 – 787 1,000 – 800 = 200 787 951 – 4 Step 1 Subtract the ones. 4 11 1 < 7, so rename 5 tens as 4 tens, 10 ones. Then 10 ones + 1 one = 11 ones.

12. Example 4 Step 2 Subtract the tens. 787787 951 – 4 4 11 4 < 8, so rename 9 hundreds as 8 hundreds, 10 tens. Then 10 tens + 4 tens = 14 tens. 6 8 14 Step 3 Subtract the hundreds. 787 951 – 64 4 118 14 1 Subtract with Regrouping Answer: 951 – 787 = 164

13. 1.A 2.B 3.C 4.D Example 4 A.435 B.433 C.334 D.234 Find 823 – 589.

14. End of the Lesson End Lesson

15. Resources Five-Minute Check (over Lesson 2–3) Image Bank Math Tool Chest Add and Subtract Decimals

16. 1.A 2.B 3.C 4.D Five Minute Check 1 (over Lesson 2–3) Solve. Use the work backward strategy. Marita’s dad made fruit bars for the bake sale. After selling 34, eating 2, and giving away 4, there were 8 fruit bars left over. How many fruit bars did Marita’s dad bake in all? A.50 fruit bars B.49 fruits bars C.48 fruit bars D.47 fruit bars

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