A placeholder is where we use the digit 0 to hold a place in a number and maintain place value.

The magnitude of a number is its distance from 0 

Explain the use of placeholders when multiplying whole numbers by 100

Maths

In this unit pupils will explain the relationship between multiplying and dividing a number by 10 and multiples of 10.  In the future unit pupils will describe represent and order tenths as decimal fractions. They will round decimal numbers with tenths to the nearest whole number.

In the prior unit pupils used knowledge of the distributive law to calculate products beyond known times tables facts. In this unit pupils will explain the relationship between multiplying and dividing a number by 10 and multiples of 10. 

Understand what happens when a number is multiplied or divided by 10 and 100

Look at the image. The label below the arrow is missing a number. Complete it. {{ }} times the size.

Which of the following equations is represented by the place value counters and the arrow in the image?

True or false? To multiply a whole number by 100, you just add two zeros.

What is the equation being represented in the place value chart showing before and after?

Match the numbers with the numbers that are 100 times the size.

What number is being represented using the Base 10 blocks?

What number is being represented in the place value chart?

What number is being represented using the place value counters?

This lesson will soon be taken down.

Explain the use of placeholders when multiplying whole numbers by 100

Lesson outcome