Number Bonds: Addition

Hello sweet second graders and amazing parents! Thank you for taking the time to read this post about NUMBER BONDS.


I have to make a very strong point- if your child does addition and subtraction without number bonds, but can get the correct answer, that is FABULOUS. There are so many wonderful strategies out there- such as using touch dots, a number line, or the old regrouping method that we learned as kids. However your child WILL be tested on using number bonds to add and subtract. So while this may not be your child’s strategy of choice- it is still one that they are expected to master in second grade.

Before I started teaching again I had heard about how tricky and different the common core math is for not only students but for parents… and I can see why! It is now my mission to make it more understandable for you and your child. I have spent hours pouring over our number bond lessons and even made some power points to help us understand the purpose of number bonds in regards to addition and subtraction. I turned these power points into a video screen cast (audio wasn’t working for some reason though).

The first one is showing how we can “construct”  number sentences (or equations) with number bonds when adding within 20. I have told our class that we love to build groups of 10. That is why having mastery of all the facts that equal 10 is so important (1+9, 2+8, 3+7, etc). Please watch this with your kiddo before doing number bond homework. (You can also watch this fun video on the friends of 10) We will watch it in class, too… as soon as our projector is working! I strongly feel after looking over homework that these number bonds are a challenge for a majority of our class.

The second video is showing number sentences with number bonds when adding within 100. This is more difficult- and a concept we haven’t covered in class YET but we will be within the next week or two.

I will be posting our 2 subtraction presentations soon, so look for those in the near future.

Again- thanks for reading this post!