10,000 ways to practice.
One idea at a time.

Attempt · Explain · Animate

Grade 3 practice chapters

1. Grade 3 · Chapter 281

   Separate covering from boundary distance: width: 7; height: 14

   A rectangular plan for a classroom activity measures 7 units across and 14 units high. Find the original perimeter and area, explain the calculation, and check a related question.

   Question · Worked solution · Animated example

   Open practice chapter

2. Grade 3 · Chapter 282

   Combine hundreds and regroup the total: first three-digit amount: 303; second amount: 61

   At a classroom activity, a first group contains 303 counters and another group brings 61 counters. Find the total after both groups join, explain the calculation, and check a related question.

   Question · Worked solution · Animated example

   Open practice chapter

3. Grade 3 · Chapter 283

   Choose the nearer hundred: original count: 428; rounding place: 100

   A report for a classroom activity contains a count of 428 and asks for rounding to the nearest 100. Find the rounded report using the stated place and upward midpoint rule, explain the calculation, and check a related question.

   Question · Worked solution · Animated example

   Open practice chapter

4. Grade 3 · Chapter 284

   Cross an hour boundary with minutes: starting whole hour: 7; duration: 170 minutes

   An activity at a classroom activity starts at 7:00 and runs for 170 minutes. Find the clock reading at the planned end, explain the calculation, and check a related question.

   Question · Worked solution · Animated example

   Open practice chapter

5. Grade 3 · Chapter 285

   Read totals and differences from bars: category a: 49; category b: 19; category c: 16

   A survey display at a classroom activity records three category counts: 49 counters, 19 counters, and 16 counters. Find the total count and the largest and smallest category counts, explain the calculation, and check a related question.

   Question · Worked solution · Animated example

   Open practice chapter

6. Grade 3 · Chapter 286

   Count groups of a chosen size: objects available: 60; objects required in each group: 10

   At a classroom activity, 60 counters are packed in groups of exactly 10. Find the number of complete groups and the remainder, explain the calculation, and check a related question.

   Question · Worked solution · Animated example

   Open practice chapter

7. Grade 3 · Chapter 287

   Count equal fractional pieces: selected pieces: 10; equal pieces in each whole: 8

   A supply strip for a classroom activity is cut into 8 equal pieces per whole, and 10 pieces are selected. Find the original selected amount as an exact fraction, explain the calculation, and check a related question.

   Question · Worked solution · Animated example

   Open practice chapter

8. Grade 3 · Chapter 288

   Build area with equal square units: rows of unit squares: 5; squares in each row: 9

   A rectangular arrangement for a classroom activity has 5 rows with 9 unit squares in each row. Find the area of the original rectangle in square units, explain the calculation, and check a related question.

   Question · Worked solution · Animated example

   Open practice chapter

9. Grade 3 · Chapter 289

   Combine hundreds and regroup the total: first three-digit amount: 207; second amount: 173

   At a classroom activity, a first group contains 207 counters and another group brings 173 counters. Find the total after both groups join, explain the calculation, and check a related question.

   Question · Worked solution · Animated example

   Open practice chapter

10. Grade 3 · Chapter 290

    Choose the nearer hundred: original count: 645; rounding place: 10

    A report for a classroom activity contains a count of 645 and asks for rounding to the nearest 10. Find the rounded report using the stated place and upward midpoint rule, explain the calculation, and check a related question.

    Question · Worked solution · Animated example

    Open practice chapter

11. Grade 3 · Chapter 291

    Cross an hour boundary with minutes: starting whole hour: 12; duration: 100 minutes

    An activity at a classroom activity starts at 12:00 and runs for 100 minutes. Find the clock reading at the planned end, explain the calculation, and check a related question.

    Question · Worked solution · Animated example

    Open practice chapter

12. Grade 3 · Chapter 292

    Read totals and differences from bars: category a: 30; category b: 1; category c: 54

    A survey display at a classroom activity records three category counts: 30 counters, 1 counter, and 54 counters. Find the total count and the largest and smallest category counts, explain the calculation, and check a related question.

    Question · Worked solution · Animated example

    Open practice chapter

13. Grade 3 · Chapter 293

    Count groups of a chosen size: objects available: 17; objects required in each group: 7

    At a classroom activity, 17 counters are packed in groups of exactly 7. Find the number of complete groups and the remainder, explain the calculation, and check a related question.

    Question · Worked solution · Animated example

    Open practice chapter

14. Grade 3 · Chapter 294

    Count equal fractional pieces: selected pieces: 8; equal pieces in each whole: 4

    A supply strip for a classroom activity is cut into 4 equal pieces per whole, and 8 pieces are selected. Find the original selected amount as an exact fraction, explain the calculation, and check a related question.

    Question · Worked solution · Animated example

    Open practice chapter

15. Grade 3 · Chapter 295

    Build area with equal square units: rows of unit squares: 2; squares in each row: 5

    A rectangular arrangement for a classroom activity has 2 rows with 5 unit squares in each row. Find the area of the original rectangle in square units, explain the calculation, and check a related question.

    Question · Worked solution · Animated example

    Open practice chapter

16. Grade 3 · Chapter 296

    Separate covering from boundary distance: width: 15; height: 2

    A rectangular plan for a classroom activity measures 15 units across and 2 units high. Find the original perimeter and area, explain the calculation, and check a related question.

    Question · Worked solution · Animated example

    Open practice chapter

17. Grade 3 · Chapter 297

    Combine hundreds and regroup the total: first three-digit amount: 111; second amount: 104

    At a classroom activity, a first group contains 111 counters and another group brings 104 counters. Find the total after both groups join, explain the calculation, and check a related question.

    Question · Worked solution · Animated example

    Open practice chapter

18. Grade 3 · Chapter 298

    Choose the nearer hundred: original count: 862; rounding place: 100

    A report for a classroom activity contains a count of 862 and asks for rounding to the nearest 100. Find the rounded report using the stated place and upward midpoint rule, explain the calculation, and check a related question.

    Question · Worked solution · Animated example

    Open practice chapter

19. Grade 3 · Chapter 299

    Read totals and differences from bars: category a: 11; category b: 44; category c: 30

    A survey display at a classroom activity records three category counts: 11 counters, 44 counters, and 30 counters. Find the total count and the largest and smallest category counts, explain the calculation, and check a related question.

    Question · Worked solution · Animated example

    Open practice chapter

20. Grade 3 · Chapter 300

    Count groups of a chosen size: objects available: 74; objects required in each group: 3

    At a classroom activity, 74 counters are packed in groups of exactly 3. Find the number of complete groups and the remainder, explain the calculation, and check a related question.

    Question · Worked solution · Animated example

    Open practice chapter