Year 3 Column addition worksheet

“Addends and sums” is free to print, with no account. It is the first sheet in the Year 3 maths unit “Column addition”, for children aged 7 to 8, and takes about 20 minutes.

Print it on A4. The child's pages come first; the answers, and what each wrong answer tells you, are on the grown-up page that follows. Weeks 18 to 20 of the year, 10 sheets in the unit.

Free sample · answers on the last page

Addends and sums

Name: ____________ · Date: ____________
Year 3 · Maths · about 20 minutes
Answers are on the grown-up page

Today I can find the addends and the sum in column addition.

A Look back3 min

1.
Ravi has 40 stickers and gets 35 more. How many does he have now?
2.
Which number is 6 tens and 3 ones?
3.
Fill in the sign: 503 530

B Watch me, then you4 min

Kit is adding 35 and 42 in column addition. Which numbers are the addends, and which is the sum?

Watch me

35 and 42 are the two numbers being added. They are the addends.

35 + 42 = 77.

77 is the total, so 77 is the sum.

Now you

1.
In 27 + 12, what is the sum?

C Your turn6 min

Write the sum under the line. The addends sit above the line.

1.
21 + 35 ---- The sum is
2.
132 + 25 ---- The sum is
3.
132 + 205 ---- The sum is
4.
205 + 132 ---- The sum is

Say it out loud: Which number is the sum in each one? Does swapping the addends change the sum?

D Spot the mistake3 min

Kit says: “In 34 + 25 = 59, the sum is 34.”

1.
In 34 + 25 = 59, which number is the sum?

E Think deeper4 min

1.
Make up your own column addition with two 2-digit addends. Write the addends and the sum. Tell your grown-up which number is the sum and why.

How did it feel?

I can do it Nearly Not yet

For the grown-up

Addends and sums · 2 minutes to read

Answers, and what a wrong one tells you

A

1. 75

2. 63

3. <

B

1. 39

C

1. 56 If your child writes 26, they added only the 5 ones and skipped the 30. Ask them to add the tens column too.

2. 157

3. 337

4. 337 If your child gets a different answer from the row above, the sum should not change. Check each addend and add the ones column again.

D

1. 59 If your child writes 34 or 25, they picked an addend. The sum is the total, so it is bigger than both addends.

E

1. Look for: Two 2-digit addends, their correct sum, and an explanation that the sum is the total of the addends.

Words to use

Say“Which numbers are the addends, and which one is the sum?”

Instead of“Just tell them the answer.”

After the sheet

Make two small piles of pasta or buttons. Count each pile and write the two numbers one above the other. Draw a line under them, then ask which number will be the sum.

Tick what your child got right in StudyDen. Anything missed comes back in a later Look back box, so there's no need to redo the sheet.

The rest of this unit

9 more sheets come with a StudyDen plan, in teaching order:

Zeros keep the columns(with a plan)
Adding in columns(with a plan)
Three-digit column sums(with a plan)
Solving column puzzles(with a plan)
Regrouping ones(with a plan)
Regrouping tens in columns(with a plan)
Regrouping ones and tens(with a plan)
Quick routes and checks(with a plan)
Estimate, then add with regrouping(with a plan)

Every Year 3 maths worksheet

The worksheets plan opens a printable sheet for every lesson in Years 1 to 6, each with its answers on a separate page for you. It costs £6.99 a month or £59 a year for the whole family, with no free trial.

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