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Splash Screen. Are You Ready for Chapter 14? Lesson 1: Add Hundreds Lesson 2: Regroup Ones Lesson 3: Regroup Tens Lesson 4: Problem-Solving Strategy: Make a Table Lesson 5: Estimate Sums Lesson 6: Subtract Hundreds Lesson 7: Regroup Tens Lesson 8: Regroup Hundreds

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Chapter menu

  • Are You Ready for Chapter 14?

  • Lesson 1: Add Hundreds

  • Lesson 2: Regroup Ones

  • Lesson 3: Regroup Tens

  • Lesson 4: Problem-Solving Strategy: Make a Table

  • Lesson 5: Estimate Sums

  • Lesson 6: Subtract Hundreds

  • Lesson 7: Regroup Tens

  • Lesson 8: Regroup Hundreds

  • Lesson 9: Estimate Differences

  • Lesson 10: Problem-Solving Investigation: Choose a Strategy

  • Chapter 14 Review

Select a hyperlink to go to the corresponding slides.

Chapter Menu






Lesson 1 get ready 1

Lesson 1—Get Ready 1



Lesson 1 teach

5

0

0

  • How can you solve 500 + 400?

4

0

0

Lesson 1—Teach


Lesson 1 teach1

5

0

0

  • What addition fact can you use to solve this problem?

4

0

0

5 + 4 = 9

Lesson 1—Teach


Lesson 1 teach2

5

0

0

  • What is500 + 400?

4

0

0

9

0

0

900

Lesson 1—Teach



Lesson 1 check

Add.

300 + 200 = ___

500

500 + 100 = ___

600

700 + 200 = ___

900

400 + 400 = ___

800

Lesson 1—Check




Lesson 2 get ready 2

Lesson 2—Get Ready 2


Lesson 2 get ready 3

1

Lesson 2—Get Ready 3




Lesson 2 teach

6

1

1

3

1

9

Lesson 2—Teach


Lesson 2 teach1

6

1

1

3

1

9

10

Lesson 2—Teach


Lesson 2 teach2

1

  • Regroup. 10 ones is the same as 1 ten. Where do we write the 1?

6

1

1

3

1

9

above the numbers in the tens column

Lesson 2—Teach


Lesson 2 teach3

1

  • What do we write in the ones place?

6

1

1

3

1

9

0

0

Lesson 2—Teach


Lesson 2 teach4

1

  • Add the tens. What is 1 + 1 + 1?

6

1

1

3

1

9

3

0

3

Lesson 2—Teach


Lesson 2 teach5

1

  • Add the hundreds. What is 6 + 3?

6

1

1

3

1

9

9

3

0

9

Lesson 2—Teach


Lesson 2 teach6

1

  • What is 611 + 319?

6

1

1

3

1

9

9

3

0

930

Lesson 2—Teach


Lesson 2 check

518

+ 239

268

+ 316

732

+ 129

861

757

584

Lesson 2—Check







Lesson 3 teach

3

9

9

1

4

8

Lesson 3—Teach


Lesson 3 teach1

3

9

9

1

4

8

17

Lesson 3—Teach


Lesson 3 teach2

1

  • How do we regroup 17?

3

9

9

1

4

8

7

1 ten and 7 ones

Lesson 3—Teach


Lesson 3 teach3

1

  • Add the tens. What is1 + 9 + 4?

3

9

9

1

4

8

7

14

Lesson 3—Teach


Lesson 3 teach4

1

1

  • How do we regroup 14 tens?

3

9

9

1

4

8

4

7

1 hundred and 4 tens

Lesson 3—Teach


Lesson 3 teach5

1

1

  • Add the hundreds. What is 1 + 3 + 1?

3

9

9

1

4

8

4

5

7

5

Lesson 3—Teach


Lesson 3 teach6

1

1

  • What is399 + 148?

3

9

9

1

4

8

4

5

7

547

Lesson 3—Teach


Lesson 3 check

482

+ 255

284

+ 243

182

+ 226

408

737

527

Lesson 3—Check






Lesson 4 teach1

What do I know?

Underline what you know.

Lesson 4—Teach


Lesson 4 teach2

What do I need to find?

Circle the question.

Lesson 4—Teach


Lesson 4 teach3

How will I solve the problem?

I will make a table to find the time that Sonja will leave.

Lesson 4—Teach


Lesson 4 teach4

2

4:30

3

6:30

Make a table.

Sonja’s plane will leave at 6:30.

Lesson 4—Teach


Lesson 4 teach5

Look back.Is my answer reasonable?

Flight 1 leaves at 2:30.

Flight 2 leaves at 4:30.

Flight 3 leaves at 6:30.

yes

Lesson 4—Teach


Lesson 4 check

  • Make a table to solve.

  • Conner read 1 book every week for 6 weeks. Each book had 100 pages. How many pages did he read in all?

600 pages

Lesson 4—Check




Lesson 5 get ready 2

Lesson 5—Get Ready 2




Lesson 5 teach

678 + 118

  • What is 678 rounded to the nearest ten?

680

Lesson 5—Teach


Lesson 5 teach1

678 + 118

  • What is 118 rounded to the nearest ten?

120

Lesson 5—Teach


Lesson 5 teach2

678 + 118

  • What is the estimated sum of 678 + 118 to the nearest ten?

680 + 120 = 800

Lesson 5—Teach


Lesson 5 teach3

678 + 118

  • What is 678 rounded to the nearest hundred?

700

Lesson 5—Teach


Lesson 5 teach4

678 + 118

  • What is 118 rounded to the nearest hundred?

100

Lesson 5—Teach


Lesson 5 teach5

678 + 118

  • What is the estimated sum of678 + 118 to the nearest hundred?

700 + 100 = 800

Lesson 5—Teach


Lesson 5 check

404 + 161

  • What is 404 rounded to the nearest ten?

400

Lesson 5—Check


Lesson 5 check1

404 + 161

  • What is 161 rounded to the nearest ten?

160

Lesson 5—Check


Lesson 5 check2

404 + 161

  • What is the estimated sum of404 + 161 to the nearest ten?

400 + 160 = 560

Lesson 5—Check


Lesson 5 check3

404 + 161

  • What is 404 rounded to the nearest hundred?

400

Lesson 5—Check


Lesson 5 check4

404 + 161

  • What is 161 rounded to the nearest hundred?

200

Lesson 5—Check


Lesson 5 check5

404 + 161

  • What is the estimated sum of404 + 161 to the nearest hundred?

400 + 200 = 600

Lesson 5—Check


Lesson 5 check6

404 + 161

  • Which estimate is closer to the exact answer?

rounding to the tens

Lesson 5—Check





Lesson 6 teach

  • Subtract the ones. What is 0 – 0?

6

0

0

3

0

0

0

0

Lesson 6—Teach


Lesson 6 teach1

  • Subtract the tens. What is 0 – 0?

6

0

0

3

0

0

0

0

0

Lesson 6—Teach


Lesson 6 teach2

  • Subtract the hundreds. What is 6 – 3?

6

0

0

3

0

0

3

0

0

3

Lesson 6—Teach


Lesson 6 teach3

  • When subtracting hundreds, you can ignore the zeros. All that is left is a one-digit number fact which has two zeros after it.

6

0

0

3

0

0

3

0

0

Lesson 6—Teach


Lesson 6 teach4

  • 6 hundreds– 3 hundreds3 hundreds

6

0

0

3

0

0

600– 300300

3

0

0

Lesson 6—Teach


Lesson 6 check

500

– 200

400

– 300

700

– 100

600

300

100

Lesson 6—Check




Lesson 7 get ready 2

regroup

Lesson 7—Get Ready 2


Lesson 7 get ready 3

Lesson 7—Get Ready 3


Lesson 7 get ready 4

Lesson 7—Get Ready 4


Lesson 7 get ready 5

Lesson 7—Get Ready 5


Lesson 7 teach

  • How do you solve 286 – 179?

2

8

6

1

7

9

Lesson 7—Teach


Lesson 7 teach1

Try to subtract the ones. Can you subtract 9 from 6?

2

8

6

1

7

9

no

Lesson 7—Teach


Lesson 7 teach2

Regroup the tens. Change one of the tens into ten ones. How many tens does that leave you?

7

2

8

6

1

7

9

8 – 1 = 7

Lesson 7—Teach


Lesson 7 teach3

How many ones does that give you?

16

7

2

8

6

1

7

9

6 + 10 = 16

Lesson 7—Teach


Lesson 7 teach4

Now subtract the ones. What is 16 – 9?

16

7

2

8

6

1

7

9

7

7

Lesson 7—Teach


Lesson 7 teach5

Subtract the tens. What is 7 – 7?

16

7

2

8

6

1

7

9

0

7

0

Lesson 7—Teach


Lesson 7 teach6

Subtract the hundreds. What is 2 – 1?

16

7

2

8

6

1

7

9

1

0

7

1

Lesson 7—Teach


Lesson 7 teach7

What is286 – 179?

16

7

2

8

6

1

7

9

1

0

7

107

Lesson 7—Teach


Lesson 7 check

998

– 389

753

– 119

873

– 14

859

609

634

Lesson 7—Check




Lesson 8 get ready 2

Lesson 8—Get Ready 2


Lesson 8 get ready 3

Lesson 8—Get Ready 3


Lesson 8 get ready 4

Lesson 8—Get Ready 4


Lesson 8 teach

  • How do you solve 534 – 152?

5

3

4

1

5

2

Lesson 8—Teach


Lesson 8 teach1

  • Subtract the ones. What is 4 – 2?

5

3

4

1

5

2

2

2

Lesson 8—Teach


Lesson 8 teach2

  • Try to subtract the tens. Can you subtract 5 from 3?

5

3

4

1

5

2

2

no

Lesson 8—Teach


Lesson 8 teach3

  • Regroup the hundreds. Change one of the hundreds into 10 tens. How many hundreds does that leave you?

4

5

3

4

1

5

2

2

5 – 1 = 4

Lesson 8—Teach


Lesson 8 teach4

  • How many tens does that give you?

13

4

5

3

4

1

5

2

2

3 + 10 = 13

Lesson 8—Teach


Lesson 8 teach5

  • Now subtract the tens. What is 13 – 5?

13

4

5

3

4

1

5

2

8

2

8

Lesson 8—Teach


Lesson 8 teach6

  • Subtract the hundreds. What is 4 – 1?

13

4

5

3

4

1

5

2

3

8

2

3

Lesson 8—Teach


Lesson 8 teach7

  • What is534 – 152?

13

4

5

3

4

1

5

2

3

8

2

382

Lesson 8—Teach


Lesson 8 check

277

– 194

537

– 356

518

– 65

453

83

181

Lesson 8—Check







Lesson 9 teach

434 – 196

  • What is 434 rounded to the nearest hundred?

400

Lesson 9—Teach


Lesson 9 teach1

434 – 196

  • What is 196 rounded to the nearest hundred?

200

Lesson 9—Teach


Lesson 9 teach2

434 – 196

  • What is the difference between 400 and 200?

400 – 200 = 200

Lesson 9—Teach


Lesson 9 teach3

434 – 196

  • 434 – 196 is about 200. You have rounded numbers to the hundreds to estimate the solution to the problem.

Lesson 9—Teach


Lesson 9 teach4

434 – 196

  • What is 434 rounded to the nearest ten?

430

Lesson 9—Teach


Lesson 9 teach5

434 – 196

  • What is 196 rounded to the nearest ten?

200

Lesson 9—Teach


Lesson 9 teach6

434 – 196

  • What is the difference between 430 and 200?

430 – 200 = 230

Lesson 9—Teach


Lesson 9 teach7

434 – 196

  • 434 – 196 is about 230. You have rounded numbers to the tens to estimate the solution to the problem.

Lesson 9—Teach


Lesson 9 check

598 – 294

  • What is 598 rounded to the nearest hundred?

600

Lesson 9—Check


Lesson 9 check1

598 – 294

  • What is 294 rounded to the nearest hundred?

300

Lesson 9—Check


Lesson 9 check2

598 – 294

  • What is the difference between 600 and 300?

600 – 300 = 300

Lesson 9—Check


Lesson 9 check3

598 – 294

  • What is 598 rounded to the nearest ten?

600

Lesson 9—Check


Lesson 9 check4

598 – 294

  • What is 294 rounded to the nearest ten?

290

Lesson 9—Check


Lesson 9 check5

598 – 294

  • What is the difference between 600 and 290?

600 – 290 = 310

Lesson 9—Check


Lesson 9 check6

598 – 294

  • Which estimate is closer to the exact answer?

rounding to the hundreds

Lesson 9—Check





Lesson 10 teach

Lesson 10—Teach


Lesson 10 teach1

Lesson 10—Teach


Lesson 10 teach2

Lesson 10—Teach



Lesson 10 teach4

One way is to work backward.

I have 300 cubes left.

I gave 100 cubes to Rikki.

I gave 200 cubes to Polly.

300 + 100 + 200 = 600

300

+ 100

+ 200

600

I started with 600 cubes.

Lesson 10—Teach


Lesson 10 teach5

  • Is my answerreasonable?

  • 600 – 200 = 400I gave Polly 200 cubes.

  • 400 – 100 = 300I gave Rikki 100 cubes.

The answer is correct.

Lesson 10—Teach


Lesson 10 check

  • Choose a strategy. Solve.

  • I am a number less than 150. There is a 7 in my ones place. I am greater than 140. What number am I?

147

Lesson 10—Check



Chapter review 1

Complete the sentences.

regroup

To ____________ is to take apart a number and write it a new way.

To ____________ is to change the value of a number into one that is easier to work with.

round

regroup

round

Chapter Review 1


Chapter review 2

438

– 165

263

– 116

542

+ 239

781

273

147

Chapter Review 2



Chapter resources

Image Bank

Math Tools

Regroup Ones

Regroup Tens

Regroup Hundreds

Chapter Resources