29.01.2021

WALT - Grouping numbers with base 10 

 

Starter – Using the number track below

• Count forwards from 40 to 49
• Count backwards from 45 to 38

 

 

Can you count in tens to complete the tables below?

 

 

 

 

Task 1 – We can use base 10 blocks to help us count and for addition or subtraction. It makes it easier by grouping how many tens and ones we have.

 

If we take the number 37…. we know that we can count in 1’s to make 37:

 

 

But we could also group our 10’s together to make it easier, 3 lots of 10:

 

 

And 7 1’s:

 

 

Using base 10, can you work out what numbers are represented by the blocks below?

 

 

Task 2 – In your maths books, can you draw a base 10 model for the number 48?

You can use dots, circles or squares to represent the ones and lines to represent the 10s.

 

 

Extension –