# Math Update!

After reviewing the MAKE A TEN STRATEGY, we took a math quiz, which the students all did very well on. Then, we moved on to studying our doubles facts. Many of our first graders know the first 5 doubles in a snap. The final 5 doubles were a little tougher.

We talked about how we can use what we know about doubles to help us solve other equations. We noticed that there is often a set of doubles that can be found hiding inside an equation. If we can find the hidden double, all we need to do is add one or subtract one to solve the equation.  For example:

We will continue to work on our doubles facts, so our first graders can more easily use the Doubles +1 and Doubles -1 strategy. It would be wonderful if your child could practice their doubles facts at home too!! Practice makes permanent!!

We also studied some LARGE, TWO-DIGIT numbers this week — some of the biggest numbers that we’ve worked with so far this year!  We noticed that every 2-digit number has a place to show the tens hiding inside along with a place to show the extra ones.  We also represented these numbers using ten sticks and circles, and wrote an equation to match our work.

Since we were working with two digit numbers, we spent a lot of time counting tens and ones this week too.  We were able to do this practice using ten sticks and circles, the number path on our whiteboards, and boxes/jars of objects.  Our first graders learned to count the tens first and then “freeze” before counting up the extra ones.  Taking the time to “freeze” is an important strategy that helps our students recognize when it’s time to switch from counting by 10s to 1s.

We can tell that our first graders are really beginning to understand the place value of these larger numbers!!!