Here we will use patterns in subtraction to help us find the difference between a two-digit and single-digit number.
Sometimes, you can partition or split the tens number to help. For example, 16 is the same as one ten and 6 ones.
Let's look at an example, can you see a pattern in the difference sum or the answers?
So, in this example, we can see that when subtracting 9 from a two-digit number ending in six, you get an answer with a number ending in seven.
$12-4=8$12−4=8. Use this to find:
Complete the pattern below.
Know how many ones, tens, and hundreds are in whole numbers to at least 1000.
Generalise that whole numbers can be partitioned in many ways