A way of recording the steps of a calculation focusing on partitioning one or more factors and showing partial products.

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

To find a value that is close enough to the right answer, usually with some thought or calculation involved.

Use estimation to support accurate calculation

Maths

In this unit pupils will learn to multiply a 3-digit number by a single-digit number using expanded and short multiplication.  In the future unit pupils will learn why the product stays the same when one factor is doubled and the other is halved and explain the effect on the product when scaling the factors by the same amount.

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

Multiplication by partitioning leading to short multiplication (3 by 1-digit)

Which multiples of 100 is 447 in between?

Match the sentence stems to the correct inequalities expression

Estimate the numbers that the answer will be between for the value of the expression 547 × 3

Choose an appropriate estimation for the value of the expression 471 × 4

Estimate the numbers that the answer will be between for the value of the expression: 647 × 7

Eric buys 6 football tickets at £304 each. He then sells 1 at a discounted price of £299. How much did he spend altogether? £{{ }}

26 × 4 Use the expressions. The answer will be between 80 and {{ }}. 

Estimate and record your calculation as an informal or formal strategy.  Eric buys 4 football tickets at £32 each. He then sells 1 at a discounted price of £29. How much did he spend in total? £{{}}

This lesson will soon be taken down.

Use estimation to support accurate calculation

Lesson outcome