Understand that multiplying by 10 makes a number ten times the size

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

Jun has a sticky-tack worm that he measures at 2 cm long. He stretches it to be three times the size. How long will it be now? {{ }} cm

Match the quantities with the quantities that are ten times the size.

Which of the following operations should be used to find ten times the size?

Sofia has a slinky that she measures at 5 cm long. She stretches it to be ten times the size. How long will it be now? {{ }} cm

What’s the multiplication being represented on this Gattegno chart?

True or false: 10 times as many and 10 times the size are the same.

What number is being shown on the Gattegno chart?

Which of these numbers is a multiple of 10?

Andeep has ten times as many marbles as Jun. If Jun has 5 marbles, how many does Andeep have?

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