Year 1 Additive structures: addition worksheet

“Parts joined with plus” is free to print, with no account. It is the first sheet in the Year 1 maths unit “Additive structures: addition”, for children aged 5 to 6, 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 19 of the year, 10 sheets in the unit.

Free sample · answers on the last page

Parts joined with plus

Name: ____________ · Date: ____________
Year 1 · Maths · about 20 minutes
Answers are on the grown-up page

Today I can write a plus sum for two parts and say what they make together.

A Look back3 min

1.
What must be added to 4 to make 10?
2.
What comes after 16?
3.
Which is more: 8 or 5? Write the sign. 8 5

B Watch me, then you4 min

Mia has some pencils in a pot. Two are green and three are red.

Watch me

2 green pencils and 3 red pencils.

The two parts join to make 5 pencils.

We write it as 2 + 3 = 5.

Now you

1.
Ali has 4 toy cars and 1 toy bus. + =

C Your turn6 min

Sam and Ella sort their beads into two pots. Write each sum.

Two small empty pots side by side on a table, ready for beads

1.
Sam has 3 red beads and 2 blue beads. + =
2.
Sam has 3 red beads and 4 blue beads. + =
3.
Sam has 4 red beads and 4 blue beads. + =
4.
Ella has 5 pink beads and 0 green beads. + =

Say it out loud: When one part changes, what happens to the whole?

D Spot the mistake3 min

Kit says: “The parts 2 and 3 make 6, so 2 + 3 = 6.”

1.
What do the parts 2 and 3 really make?

E Think deeper3 min

1.
The whole group is 4 apples. Circle the plus sums that make 4.
1 + 32 + 24 + 12 + 30 + 4

How did it feel?

I can do it Nearly Not yet

For the grown-up

Parts joined with plus · 2 minutes to read

Answers, and what a wrong one tells you

A

1. 6

2. 17

3. >

B

1. 4 + 1 = 5. 1 + 4 = 5 is also right.

C

1. 3 + 2 = 5. 2 + 3 = 5 is also right.

2. 3 + 4 = 7. 4 + 3 = 7 is also right.

3. 4 + 4 = 8 If your child writes 7, they may have counted one short. Count both groups: 4, then 4 more is 8.

4. 5 + 0 = 5. 0 + 5 = 5 is also right. If your child writes 0, they may think adding 0 gives 0. Adding nothing leaves the 5 pink beads as they are.

D

1. 5 If your child writes 6, they have added one too many. Count the 2, then count on 3: 2, 3, 4, 5. The total is 5, not 6.

E

1. 1 + 3, 2 + 2, 0 + 4 If your child circles 4 + 1 or 2 + 3, ask what those parts make together. Can the apples be 5 when there are only 4?

Words to use

Say“Which two parts make the whole? Say the plus sum out loud.”

Instead of“Just tell them the answer is 5.”

After the sheet

Put 6 buttons in a pile, split them into two heaps any way you like, and say a plus sum for each 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

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

Turning Parts Round(with a plan)
Both sides are the same(with a plan)
Parts and wholes(with a plan)
Parts Make the Whole(with a plan)
Finding the hidden part(with a plan)
Splitting a whole group(with a plan)
Subtracting with bar models(with a plan)
Adding and taking away(with a plan)
Now There Are More(with a plan)

Every Year 1 maths worksheet

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