This week we have been making numbers to 20 by thinking about how many tens and ones the numbers have.

We are able to break a whole number into parts and say how much is in each part.

Gracie’s number is 18 – She has represented 18 using 1 ten and 8 ones. (Above)

Gracie then split her whole number in two parts (Below), she said,

“6 is a part, 12 is a part, 18 is the whole” 

The class worked together to write this as a number sentence, 6 + 12 = 18.

How many different ways can you break up the number 18? Can you think of a number sentence for each?