New
New
Year 5

Multiply a 2-digit number by a 1-digit number using short multiplication (no regroups)

I can multiply a 2-digit number by a 1-digit number using short multiplication (no regroups).

New
New
Year 5

Multiply a 2-digit number by a 1-digit number using short multiplication (no regroups)

I can multiply a 2-digit number by a 1-digit number using short multiplication (no regroups).

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Lesson details

Key learning points

  1. Short multiplication is another way of representing 2-digit by 1-digit multiplication.
  2. There are similarities between the representations of multiplication.
  3. Arranging the factors in columns allows you to organise the partial products into a column addition.

Common misconception

When using the short method, pupils may not align the digits correctly with the same place value.

Continue to ask what each digit that has been recorded represents, linking back to the place value chart.

Keywords

  • Short multiplication - A way of recording using columns to set out and calculate a multiplication.

  • Factor - A number that divides exactly into another number.

Ensure pupils have lots of opportunities to set out their own short multiplication layouts. Model the alignment of digits: you may wish to provide scaffolds for some learners initially to ensure accurate layout.
Teacher tip

Licence

This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).

Video

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6 Questions

Q1.
When multiplying a 2-digit by a 1-digit number using expanded multiplication we usually place the __________ factor at the top.
Correct answer: larger
smaller
multiplying
Q2.
Jacob is chanting his 6 times tables: 6, 12, 18, What comes next?
20
Correct answer: 24
25
26
Q3.
Izzy is chanting her 8 times tables: 8, 16, 24, What comes next?
Correct Answer: 32, Thirty two, Thirty-two, thirty-two
Q4.
Which is the correct arrangement for: 80 × 5
picture 1
Correct answer: picture 2
picture 3
Q5.
Find the missing partial product from the layout shown.
An image in a quiz
Correct Answer: 80, eighty, Eighty
Q6.
Look at the expanded multiplication layout. What is the missing factor?
An image in a quiz
Correct Answer: 3, three, Three

6 Questions

Q1.
Look at the image. The arrows are pointing to .
An image in a quiz
Correct Answer: factors, factor, the factors, Factors
Q2.
The multiplication is: 41 × 2 Which short multiplication shows this correctly?
Picture 1
Correct answer: Picture 2
Picture 3
Q3.
Use short multiplication to calculate the answer to: 34 × 2
Correct Answer: 68, sixty eight, sixty-eight, Sixty-eight
Q4.
Use short multiplication to calculate the answer to: 31 × 3
Correct Answer: 93, Ninety three, Ninety-three, ninety-three
Q5.
Select the correct short multiplication method for this representation.
An image in a quiz
Correct answer: Picture 2
Picture 3
Pic 4
Q6.
Numbers from this calculation have rubbed off. What could the missing number be?
An image in a quiz
Correct Answer: 2, two, Two