NO Calculator please!

Mental Math Only!

Our problem: Find the difference , 62 - 28.

We're just having some fun here. This method is not presented to replace your method. We're just exploring a different way.

Let's do the math from left to right. Note the recognition of place value.

Uh-Oh! The ones' digit in the subtrahend is larger than the ones's digit in the minuend.

Notice my big vocabulary!

8 is 6 bigger than 2. So we are 6 short of what we need.

Good problem solvers always find another way when they need to.

Remember that 40 that you got a minute ago.