Unit+4

=Unit 4 - Addition and Subtraction=

**In this unit we learn how to add bigger numbers and estimate to the closest zero number. There are some great games below to help you become a math expert.**
Speed Grid Challenge - This addition game is a challenge, but it's a lot of fun! You have to be fast and the numbers are a little bigger than earlier games.

Number line estimating - place the dot where it belongs on the number line

Estimating addition - multiple choice estimation game using double digit addition