Let’s Find the 10s {FREE}

You can do this activity with your students at the board or on worksheets.

Provide them with a really long horizontal sum. Something like this:

3 + 11 + 7 + 5 + 5 + 4 + 9 + 1 + 2 + 13 + 8 =

The idea here is to group pairs of numbers into tens or multiples of ten so that they can quickly and easily find the sum using mental math.

Mental Stretch

Here’s a fun game that you can play with the students in your classroom to get their mental juices going! Begin with a simple whole number like 5. Then start giving the students operations that they should perform in their heads. Use a variety of all four operations and make sure the directions you give will yield whole numbers.