Important Subtraction strategies!!

Here is the context for our current math investigation!

Remember our friendly numbers: 100, 10, 5 and extra's (1's)

Using different colours can help us think about our hops, skips and jumps!

Here we can think about how to get to a LANDMARK NUMBER (30) to then make the backwards jumps of 10 and 5 "easier".  

We can create new equations by breaking the original one down into smaller parts!

So first we think about using the friendly 10 inside of the 16, and subtracting 160-10 = 150. And then we do the remainder which is 150-6= 144