# Second Grade Math Warm-Ups: Week of May 9-13, 2016

This week was relatively normal, but somehow I only have 3 warm-ups to share.Enjoy! Please comment when you’re finished reading and let us know what you think!

Monday

Yep, we’re still working on subtraction around here.  It’s kind of an all-the-time thing because as soon as you abandon it for longer than a few days everyone forgets how to do it!  This time I gave them the answer and the strategy and had them analyze it for me.  We had a great conversation about why this problem was most efficiently solved by making an easier problem (rather than say, the traditional algorithm or splitting and using a number line to model it) because the second number was close to a hundred.  This made it SUPER easy to subtract in just two easy steps.

Friday

Um, yeah…not really sure what happened that our warm-ups are just from Monday and Friday.  We must have been really busy this week.  Hope I remember what we did so I can tell you about it here. LOL

Friday we actually had a bonus math warm-up because our Writing Warm-Up led us to figuring out some math and making a graph.  And yes, I ran out of paper.  We improvised. 🙂

We are also still working on multiplication, including writing an equation and drawing a model.  This one was cool, because as often happens, kiddos thought of a model that I hadn’t: showing the repeated addition on a number line.  This was a great conversation about which number meant what in the problem (the number of groups vs. the number in the group), and we also talked about how you could flip the problem around and have the same answer.