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?

Starter Quiz