Understand Whether Missing Number is Ten or One

In this activity, we will be testing our knowledge of tens and ones.

 

Can you add together the number of packets of cakes with the number of loose cakes?

There are ten cakes in a packet.

 

 

 

Example

You have one packet of cakes and nine loose cakes.

 

 

Which number is missing?

 

19

=

10

+

 

Answer

You have 19 cakes in total.

There are 10 cakes in the packet.

There are 9 loose cakes.

 

19

=

10

+

9

 

How was that?

 

Let's try some questions on this now.