 2011 PERFORMANCES     Making less than 10

Grade 2 students explored all the possible ways of solving number sentences like _ + _ < 10.

How many solutions are there?

 Less than 10 how many sums, That’s what I want to know, 2+3, 3+4 ,But there’s more 6+1, 4+0, how many more in the list 3+ 5 and 1 + 6, When do I stop? Need a way to keep track Yeah I Need a way to keep track To find all the sums, is all that I ask ‘cause what I want you to understand….. I’d go out of my way for math I’d miss recess and lunch for math I’d wait all day in a line for math You know I’d do anything for math I would do all this in the rain Till all the sums fill up all of my brain Yes I would do all this for math but I need, Your help with this sums chain 2+4, 4+2 I’m losing track of what I have But then you say hey get back to where you started from 0+0, 0+1, yeah that’s the start, 0+2, 0+3, and keep going To 0+9, then 1+0, 1+1 and on and on To 1+8, I see the pattern, I see it now 10 ways with 0, 9 ways with 1, 8 ways with 2 That’s the way to keep track, 10 + 9 + 8 All the way down to 1 That’s 55 ways To find all the sums, ‘cause now that I understand this math I’d go out of my way for math I’d miss recess and lunch for math I’d wait all day in a line for math You know I’d do anything for math I would do all this in the rain Till all the sums fill up all of my brain Yes I would do all this for math but I need, Your help with this sums chain   