4th grade · Math · Unit 2 of 12
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.
Minnesota K-12 Academic Standards benchmark: 4.3.5.3; 4.3.5.9 · estimating and solving multi-step problems with multi-digit whole numbers
How we explain it
Children can open this short lesson before they practice.
- Line up the digits by place value.
- Work from the ones to the thousands.
- 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 Minnesota
In the Minnesota K-12 Academic Standards, this is unit 2 of 12 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.
Sample questions
A taste of this unit. In the app, questions change every time and get easier or harder to match your child.
Question 1
What is 6568 + 704?
6568 + 704 = ?
answer box
7272
Hint: Add place by place: 6000 + 0 = 6000, 500 + 700 = 1200, 60 + 0 = 60, 8 + 4 = 12. Then add those: 6000 + 1200 + 60 + 12.
Question 2
What is 1843 + 2264?
1843 + 2264 = ?
- 3007
- 4117
- 4007
- 4107
4107
Hint: Add place by place: 1000 + 2000 = 3000, 800 + 200 = 1000, 40 + 60 = 100, 3 + 4 = 7. Then add those: 3000 + 1000 + 100 + 7.
Question 3
A farm grew 2377 pumpkins last year and 1117 pumpkins this year. How many pumpkins is that in all?
🎃- 1260
- 3494
- 3594
- 3484
3494
Hint: Put the two amounts together: 2377 + 1117. Add place by place: 2000 + 1000 = 3000, 300 + 100 = 400, 70 + 10 = 80, 7 + 7 = 14. Then add those: 3000 + 400 + 80 + 14.
Question 4
What number goes in the box?
6522 + = 8600
answer box
2078
Hint: Think: what do you add to 6522 to make 8600? Count up from 6522: +8 → 6530, +70 → 6600, +400 → 7000, +1600 → 8600. Then add up the jumps: 8 + 70 + 400 + 1600.
Question 5
What is 6060 − 1650?
6060 − 1650 = ?
answer box
4410
Hint: Line up the places and start with the ones. If the top digit is too small, regroup 1 from the next place to the left. Check by adding your answer to 1650: you should get 6060.
Question 6
Estimate 5871 + 1896 by rounding each number to the nearest thousand.
- 8000
- 10,000
- 7000
- 9000
8000
Hint: 5871 rounds to 6000 and 1896 rounds to 2000. 6000 + 2000 = 8000.