Year 5 Multiplication by partitioning leading to short multiplication (2 by 1-digit) worksheet

“Multiply with one regroup” is free to print, with no account. It is the first sheet in the Year 5 maths unit “Multiplication by partitioning leading to short multiplication (2 by 1-digit)”, for children aged 9 to 10, 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 7 to 8 of the year, 10 sheets in the unit.

Free sample · answers on the last page

Multiply with one regroup

Name: ____________ · Date: ____________
Year 5 · Maths · about 20 minutes
Answers are on the grown-up page

Today I can multiply a 2-digit number by a 1-digit number, partitioning and regrouping once.

A Look back3 min

1.
4 tens and 6 ones make
2.
5 × 7 =
3.
27 = + 7

B Watch me, then you4 min

Ava has 3 jars. Each jar has 15 sweets. How many sweets are there altogether?

Watch me

One jar has 15: 1 ten and 5 ones.

3 × 10 = 30 and 3 × 5 = 15.

30 + 15 = 45, so there are 45 sweets.

Now you

1.
A box holds 13 pencils. Leo has 4 boxes. How many pencils altogether?

C Your turn5 min

Each picture shows one bag. Work out the total for the number of bags in the sum.

1.
Each bag has 12 apples. 3 bags. 3 × 12 =
2.
Each bag has 14 apples. 3 bags. 3 × 14 =
3.
Each bag has 16 apples. 3 bags. 3 × 16 =
4.
Each bag has 18 apples. 3 bags. 3 × 18 =

Say it out loud: What changes in each row? When does the ones answer go past 9?

D Spot the mistake3 min

Ravi says: “4 × 23 is 20, because 4 × 2 is 8 and 4 × 3 is 12, and 8 + 12 is 20.”

1.
What is 4 × 23?

E Think deeper3 min

1.
Which numbers from 10 to 19, times 3, need a regroup in the ones column? Write them all.

How did it feel?

I can do it Nearly Not yet

For the grown-up

Multiply with one regroup · 2 minutes to read

Answers, and what a wrong one tells you

A

1. 46

2. 35

3. 20

B

1. 52 If your child writes 42, the ten from the 12 ones was lost, so 40 + 2 = 42. Ask: how many tens are in 12 ones?

C

1. 36

2. 42 If your child writes 32, the ten from the 12 ones was lost, so 30 + 2 = 32. Ask: how many tens are in 12 ones?

3. 48 If your child writes 38, the ten from the 18 ones was lost, so 30 + 8 = 38. Split 18 into 10 and 8, then multiply each part by 3.

4. 54

D

1. 92 If your child writes 20, the tens digit was treated as ones. The 2 in 23 is worth 20, not 2. Split 23 into 20 and 3: 4 × 20 = 80 and 4 × 3 = 12, so 80 + 12 = 92.

E

1. 14, 15, 16, 17, 18, 19 If your child misses some, ask them to multiply just the ones digit by 3. Does the answer go past 9?

Words to use

Say“Split the big number into tens and ones, then check whether the ones answer has a ten in it.”

Instead of“Multiply the whole number in your head and hope it is right.”

After the sheet

Make 3 piles of 14 buttons or dried beans. Swap any 10 loose ones for a tens pile, then count the total together.

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:

Two regroups(with a plan)
Splitting to multiply(with a plan)
Expanded multiplication, no regrouping(with a plan)
Short multiplication, lined up(with a plan)
Regrouping ones into tens(with a plan)
Short multiplication with carrying(with a plan)
Regrouping tens into hundreds(with a plan)
Tens into hundreds(with a plan)
Estimate, then multiply(with a plan)

Every Year 5 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.

The full StudyDen plan adds the lessons themselves, marked as your child works, with the worksheets included. It is 7 days free, then £29.99 a month.

Get the worksheets Try the full plan free

Both start with a free account; you choose the plan when you sign up.