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4th grade · Math · Unit 2 of 15

Add & Subtract

Big numbers, up to 10,000

What your child practices

Adding and subtracting numbers to 10,000 with regrouping, counting up to subtract, estimating by rounding, and solving word problems.

Alaska content standards learning standard: 4.NBT.4 · fluently adding and subtracting multi-digit whole numbers

How we explain it

Children can open this short lesson before they practice.

  1. Line up the digits by place value.
  2. Work from the ones to the thousands.
  3. Regroup when a place has more than 9.

Example: 4,582 + 2,749 = ? Ones: 2 + 9 = 11. Write 1, regroup 1. Tens: 8 + 4 + 1 = 13. Write 3, regroup 1. Hundreds: 5 + 7 + 1 = 13. Write 3, regroup 1. Thousands: 4 + 2 + 1 = 7. Answer: 7,331

Add & Subtract in Alaska

In the Alaska content standards, this is unit 2 of 15 in 4th grade Math, after Numbers to 10,000 and before Multiply & Divide.

Gradelings describes a child's practice on this unit as Beginning, Approaching, Meeting or Exceeding (Four practice steps). That reflects practice, not a report-card mark: the teacher decides the mark.

Source: Alaska Department of Education and Early Development

Sample questions

A taste of this unit. In the app, questions change every time and get easier or harder to match your child.

  1. Question 1

    What is 1055 + 1049?

    1055 + 1049 = ?

    answer box

  2. Question 2

    What is 6957 + 2773?

    6957 + 2773 = ?

    • 9740
    • 8620
    • 9630
    • 9730

  3. Question 3

    What is 8695 − 3256?

    8695 − 3256 = ?

    • 5449
    • 5441
    • 5439
    • 5339

  4. Question 4

    Estimate 1957 + 2490 by rounding each number to the nearest thousand.

    • 5000
    • 3000
    • 4000
    • 6000

  5. Question 5

    Amir walked 1450 steps before lunch and 933 steps after lunch. How many steps in all?

    👟
    • 2483
    • 2373
    • 1383
    • 2383

  6. Question 6

    What number goes in the box?

    2293 + = 7100

    answer box

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