Mental Math for Addition

Mental Math for Addition

There is not just one way to get the answer to a math problem. I will be your compass, but I will not be your map.

You can find the answer in a variety of ways when adding.

• You can write it all out.

• 34  + 28=

•  I would write the problem vertical instead of horizontal to make it easier.

You can add the tens, add the ones, and then put them together.

• 34 + 28 =

• 30 + 20 = 50

• 4 + 8 = 12

• 50 + 12 = 62

You can make a friendly number.

• 34 + 28 =

• Take 2 away from the 34 and you get 32.

• Add those 2 to the 28 and you get 30.

• Add 32 + 30 = 62

Poll

Which way to you like?

• Write it out?

• Adding Tens

• Making a Friendly Number