An array is the layout of items (such as objects, numbers, etc.) arranged in rows and/or columns.

The result of two or more values multiplied together.

The process of unitising and exchanging between place values is known as regrouping.

Multiply a 2-digit number by a 1-digit number using partitioning and representations (one regroup)

Maths

In this unit pupils will multiply a 2-digit number by a single-digit number using partitioning and representations using expanded multiplication and using short multiplication. In the future unit pupils will multiply a 3-digit number by a single-digit number using expanded and short multiplication.

In the prior unit pupils explained the relationship between multiplying and dividing a number by 10 and multiples of 10. In this unit pupils will multiply a 2-digit number by a single-digit number using partitioning and representations using expanded multiplication and using short multiplication.

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

Which grid represents the multiplication fact 25 × 4?

Which multiplication is represented by this grid model?

Match the question with the amount of regrouping.

Select the correct multiplication equation for the following word problem: Lucas is preparing party packs. He has 8 packets of 32 pens. How many pens does he have altogether?

Lucas is preparing for a party, he needs a box of sweets which has more than 120 sweets but less than 160. Which box should he choose?

The number 17 can be partitioned into 1 ten and {{  }}  ones.

The number 59 can be partitioned into {{  }} tens and 9 ones.  

The answer when two or more values are multiplied together is called a {{  }} .

Look at the image. What is the name given to the numbers shown by the arrows?

Look at the array. What does it represent?

This lesson will be removed by end of Summer Term 2025.

Multiply a 2-digit number by a 1-digit number using partitioning and representations (one regroup)

Lesson outcome

This lesson will be removed by end of Summer Term 2025.