Related Facts

Parents, if you've been struggling with related facts with your child at home, you're not alone!  This has proven to be quite hard to understand in the classroom as well. Don't worry, we've spent a few days on related facts and this is to gear your learner up for fact families in a few weeks.  Just so you can help at home, here is a little more information about related facts.

If you have 3 numbers, let's say, 5, 6, and 11, these can be written as addition and subtraction related facts.  For example, 5+6=11, 6+5=11, 11-5= 6 and 11-6=5.  Here is a little more of what what did in the classroom:

This is our "Math Talk" board which students can refer to during our lesson.  Black writing is from yesterday and red writing was added today.

We started today's lesson with a story problem.  "There were seven children on the roller coaster. Three more hopped on. How many children are on the roller coaster now?"  Students used their cubes and scratch paper to help them create the problem.

Then students were given another part to the word problem.  "Seven students got off the roller coaster.  How many are on the ride now?"

This showed them the related facts for 10, 7 and 3.

For their partner work today, they played a game where one partner rolled two dice and wrote the addition fact for the two numbers.  Then, their partner wrote the subtraction fact for those same numbers.  It turned out like this:

Again, if your child is "just not getting it", fear not, we will be coming back to related facts in a few weeks.