Add two 2-digit numbers mentally when carrying is needed.
Where your child meets this in real life: Adding prices at a shop, combining scores, or totalling measurements
SEAGReady breaks add 2-digit numbers (with carry) into 2 steps, taught in order so each skill builds on the last.
Add two 2-digit numbers mentally when ones digits sum to 10 or more but total stays under 100 (e.g., 47 + 35 = 82)
Add two 2-digit numbers mentally when the total exceeds 99 (e.g., 67 + 58 = 125)
Three free sample questions from our add 2-digit numbers (with carry) course. Every question comes with a full explanation, and hints that guide without giving the answer away.
Ciara has 36 stickers. Her friend Niamh gives her 47 more stickers. How many stickers does Ciara have now?
Answer: A. 83 stickers
Add the ones first: 6 + 7 = 13 13 is more than 9, so write 3 ones and carry 1 ten. Add the tens: 30 + 40 + 10 = 80 Combine: 80 + 3 = 83 stickers
Stuck? Start here: Start by adding the ones digits: 6 + 7
Declan saved £65 last month. This month he saved £58. How much has Declan saved in total?
Answer: A. £123
Add the ones: 5 + 8 = 13 Write 3 ones, carry 1 ten. Add the tens: 6 + 5 + 1 = 12 tens 12 tens = 1 hundred and 2 tens Total: £123
Stuck? Start here: Start by adding the ones: 5 + 8 = ?
Sean scored 28 points in the first round of a game and 45 points in the second round. What is his total score?
Answer: B. 73 points
Add the ones: 8 + 5 = 13 Write 3 ones, carry 1 ten. Add the tens: 20 + 40 + 10 = 70 Total: 70 + 3 = 73 points
Stuck? Start here: Add the ones digits first: 8 + 5
This is the exact interactive worked example your child sees in SEAGReady. Step through it and watch the method build up.
Ciara has 38 stickers. Her friend Aoife gives her 45 more stickers.
How many stickers does Ciara have now?
38 + 45
Step 1 of 5
Ciara has 38 stickers. Her friend Aoife gives her 45 more stickers.
How many stickers does Ciara have now?
Ciara has 83 stickers altogether.
The key insight: When digits add to more than 9, you make a new ten to carry over!
Watch out: 38 + 45 = 713. Writing 13 in the ones column instead of carrying the 10 to the tens column.
These are the misconceptions we see most often in add 2-digit numbers (with carry), including the ones our practice questions are specifically designed to catch.
Struggling with add 2-digit numbers (with carry)? The real gap is often in one of these earlier topics.
SEAGReady finds the exact step where your child gets stuck, teaches it with worked examples like the one above, and brings it back for review so it sticks.