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

Attempt · Explain · Animate

Grade 3 practice chapters

1. Grade 3 · Chapter 401

   Separate covering from boundary distance: width: 11; height: 12

   A rectangular plan for a classroom activity measures 11 units across and 12 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 402

   Combine hundreds and regroup the total: first three-digit amount: 169; second amount: 41

   At a classroom activity, a first group contains 169 counters and another group brings 41 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 403

   Choose the nearer hundred: original count: 734; rounding place: 100

   A report for a classroom activity contains a count of 734 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 404

   Cross an hour boundary with minutes: starting whole hour: 3; duration: 165 minutes

   An activity at a classroom activity starts at 3:00 and runs for 165 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 405

   Read totals and differences from bars: category a: 50; category b: 31; category c: 9

   A survey display at a classroom activity records three category counts: 50 counters, 31 counters, and 9 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 406

   Multiply complete equal groups: rows: 9; objects in each row: 5

   A rectangular arrangement for a classroom activity has 9 rows with 5 counters in each row. Find the number of objects in the original array, explain the calculation, and check a related question.

   Question · Worked solution · Animated example

   Open practice chapter

7. Grade 3 · Chapter 407

   Count groups of a chosen size: objects available: 86; objects required in each group: 2

   At a classroom activity, 86 counters are packed in groups of exactly 2. 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

8. Grade 3 · Chapter 408

   Count equal fractional pieces: selected pieces: 2; equal pieces in each whole: 4

   A supply strip for a classroom activity is cut into 4 equal pieces per whole, and 2 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

9. Grade 3 · Chapter 409

   Build area with equal square units: rows of unit squares: 7; squares in each row: 12

   A rectangular arrangement for a classroom activity has 7 rows with 12 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

10. Grade 3 · Chapter 410

    Separate covering from boundary distance: width: 15; height: 6

    A rectangular plan for a classroom activity measures 15 units across and 6 units high. Find the original perimeter and area, explain the calculation, and check a related question.

    Question · Worked solution · Animated example

    Open practice chapter

11. Grade 3 · Chapter 411

    Combine hundreds and regroup the total: first three-digit amount: 774; second amount: 152

    At a classroom activity, a first group contains 774 counters and another group brings 152 counters. Find the total after both groups join, explain the calculation, and check a related question.

    Question · Worked solution · Animated example

    Open practice chapter

12. Grade 3 · Chapter 412

    Choose the nearer hundred: original count: 951; rounding place: 10

    A report for a classroom activity contains a count of 951 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

13. Grade 3 · Chapter 413

    Cross an hour boundary with minutes: starting whole hour: 8; duration: 95 minutes

    An activity at a classroom activity starts at 8:00 and runs for 95 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

14. Grade 3 · Chapter 414

    Read totals and differences from bars: category a: 31; category b: 13; category c: 47

    A survey display at a classroom activity records three category counts: 31 counters, 13 counters, and 47 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

15. Grade 3 · Chapter 415

    Count groups of a chosen size: objects available: 43; objects required in each group: 8

    At a classroom activity, 43 counters are packed in groups of exactly 8. 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

16. Grade 3 · Chapter 416

    Count equal fractional pieces: selected pieces: 11; equal pieces in each whole: 6

    A supply strip for a classroom activity is cut into 6 equal pieces per whole, and 11 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

17. Grade 3 · Chapter 417

    Build area with equal square units: rows of unit squares: 4; squares in each row: 8

    A rectangular arrangement for a classroom activity has 4 rows with 8 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

18. Grade 3 · Chapter 418

    Separate covering from boundary distance: width: 4; height: 1

    A rectangular plan for a classroom activity measures 4 units across and 1 units high. Find the original perimeter and area, explain the calculation, and check a related question.

    Question · Worked solution · Animated example

    Open practice chapter

19. Grade 3 · Chapter 419

    Combine hundreds and regroup the total: first three-digit amount: 678; second amount: 83

    At a classroom activity, a first group contains 678 counters and another group brings 83 counters. Find the total after both groups join, explain the calculation, and check a related question.

    Question · Worked solution · Animated example

    Open practice chapter

20. Grade 3 · Chapter 420

    Choose the nearer hundred: original count: 268; rounding place: 10

    A report for a classroom activity contains a count of 268 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