Year 2 Addition and subtraction of two 2-digit numbers worksheet

“Clever ways to add” is free to print, with no account. It is the first sheet in the Year 2 maths unit “Addition and subtraction of two 2-digit numbers”, for children aged 6 to 7, 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 23 to 25 of the year, 15 sheets in the unit.

Free sample · answers on the last page

Clever ways to add

Name: ____________ · Date: ____________
Year 2 · Maths · about 20 minutes
Answers are on the grown-up page

Today I can use known facts and splitting to add two-digit numbers efficiently.

A Look back3 min

1.
What is 10 more than 34?
2.
7 + 2 =
3.
14 − 5 =

B Watch me, then you4 min

Ola knows 4 + 3 = 7. She uses that fact to work out 40 + 30 without counting in ones.

Watch me

4 + 3 = 7 is a known fact.

4 tens and 3 tens make 7 tens.

So 40 + 30 = 70.

Now you

1.
6 + 2 = 8, so 60 + 20 =
2.
5 + 4 = 9, so 50 + 40 =

C Your turn6 min

Use a fact you know, or split a number into tens and ones.

1.
2 + 5 = 7, so 20 + 50 =
2.
4 + 5 = 9, so 40 + 50 =
3.
56 + 3 =
4.
56 + 4 =

Say it out loud: What changed between each sum? Which number did you split?

D Spot the mistake3 min

Sam says: “5 + 2 = 7, so 50 + 20 = 52.”

1.
What is 50 + 20 really?

E Think deeper3 min

1.
Ben says 38 + 2 and 30 + 10 make the same total. Is he right? Write the fact that helps you.

How did it feel?

I can do it Nearly Not yet

For the grown-up

Clever ways to add · 2 minutes to read

Answers, and what a wrong one tells you

A

1. 44

2. 9

3. 9

B

1. 80 If your child writes 62, they added the 2 to the 60 and skipped the tens. Ask: how many tens are in 20? Then add the tens.

2. 90 If your child writes 9, they forgot the tens. 9 tens is 90, so the answer has to be in the tens.

C

1. 70

2. 90

3. 59 If your child writes 53, they added 3 to the 50 and left out the 6. Split 56 into 50 and 6, then add 3 to the 6.

4. 60 If your child writes 54, they added 4 to the 50 and left out the 6. Look at the ones: 6 and 4 make 10, so 56 + 4 = 60.

D

1. 70 If your child writes 52, they kept the 2 as 2 ones: 50 + 2. But 20 is 2 tens, so 5 tens and 2 tens make 7 tens, which is 70.

E

1. Look for: Yes, both make 40. A fact such as 8 + 2 = 10, or 3 + 1 = 4 for the tens.

Words to use

Say“Look at the ones digits first. Which fact do you already know?”

Instead of“Count on in ones from the first number.”

After the sheet

Put 15 buttons or pasta pieces in two groups, like 10 and 5. Add the groups quickly, then try a different split.

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

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

Sort the tens and ones(with a plan)
Adding without crossing(with a plan)
Find the missing number(with a plan)
Adding across the ten(with a plan)
Adding bigger numbers(with a plan)
Clever ways to subtract(with a plan)
Splitting to subtract(with a plan)
Subtraction stories(with a plan)
Bridging Through Ten(with a plan)
Finding the missing part(with a plan)
Bridging 10 to subtract(with a plan)
Shortcuts in subtraction(with a plan)
Stories with two-digit numbers(with a plan)
Make your own maths stories(with a plan)

Every Year 2 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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