SME
Grade 4 Math · Problem type
Add multi-digit numbers
Use this for sums to 1,000,000 in columns, like 36,325 + 23,310.
Diagram
347,812 + 125,469 = 473,281
This is an example. Type your own values to start a new problem.
First number
+
Second number
=
Sum
Formulas
347,812 + 125,469 = 473,281
First number + second number = sum
Assumptions
•
Line up the places. Add the ones first, then each place to the left.
•
Regroup when a place passes 9: 10 in one place is 1 in the next.
Step-by-step
WE KNOW
First number: 347,812
Second number: 125,469
FIND
sum
Step 1 · Find sum
347,812 + 125,469 = ?
First number + second number = sum
Add in columns from the ones. Regroup past 9.
1
1
1
3
4
7
8
1
2
+
1
2
5
4
6
9
4
7
3
2
8
1
Sum = 473,281
Check
Put the numbers back in. Both sides should match.
347,812 + 125,469 = 473,281 ✓
Topic check
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Related lessons
Place value and rounding to one million
Main lesson
Round multi-digit numbers
Use this for “What is 47,382 rounded to the nearest thousand?”
Compare multi-digit numbers
Use this for “Which is greater: 425,900 or 452,000?” with >, < or =.
Read and write multi-digit numbers
Use this for “Which of these is equal to 6,000 + 60 + 6?” and number names.
Subtract multi-digit numbers
Use this for “Subtract: 8,214 − 5,639.”
Estimate sums
Use this for “About how many in all? 36,325 + 23,310” by rounding first.
Estimate differences
Use this for “About how many more? 61,209 − 27,845” by rounding first.
Subtract across zeros
Use this for “Subtract: 5,000 − 2,346” when the start has zeros to regroup across.