4th grade · Math · Unit 4 of 17
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.
Texas Essential Knowledge and Skills (TEKS) teks student expectation: 4.4(A) · adding and subtracting whole numbers with the standard algorithm
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 Texas
In the Texas Essential Knowledge and Skills (TEKS), this is unit 4 of 17 in 4th grade Math, after Decimals 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: Texas Education Agency (TEA)
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 2227 − 1746?
2227 − 1746 = ?
answer box
481
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 1746: you should get 2227.
Question 2
Estimate 3194 + 1737 by rounding each number to the nearest thousand.
- 5000
- 7000
- 4000
- 6000
5000
Hint: 3194 rounds to 3000 and 1737 rounds to 2000. 3000 + 2000 = 5000.
Question 3
What number goes in the box?
6443 + = 9600
answer box
3157
Hint: Think: what do you add to 6443 to make 9600? Count up from 6443: +7 → 6450, +50 → 6500, +500 → 7000, +2600 → 9600. Then add up the jumps: 7 + 50 + 500 + 2600.
Question 4
What is 1871 + 2701?
1871 + 2701 = ?
- 4582
- 4572
- 4472
- 3572
4572
Hint: Add place by place: 1000 + 2000 = 3000, 800 + 700 = 1500, 70 + 0 = 70, 1 + 1 = 2. Then add those: 3000 + 1500 + 70 + 2.
Question 5
A school collected 6306 cans in May and 1739 cans in June. How many cans altogether?
🥫- 8035
- 8145
- 7035
- 8045
8045
Hint: Put the two amounts together: 6306 + 1739. Add place by place: 6000 + 1000 = 7000, 300 + 700 = 1000, 0 + 30 = 30, 6 + 9 = 15. Then add those: 7000 + 1000 + 30 + 15.
Question 6
What is 3357 + 1016?
3357 + 1016 = ?
answer box
4373
Hint: Add place by place: 3000 + 1000 = 4000, 300 + 0 = 300, 50 + 10 = 60, 7 + 6 = 13. Then add those: 4000 + 300 + 60 + 13.