2011 PERFORMANCES
   
   

An organized list

Grade 3 students explored how many two-number sums are less than 5. The song is based on their classroom skit to answer the question, "What did you do in math today?" This is their first try at solving this problem. Can you see and other solutions?

Hi Tedi,
what did you do in math today?
It might too hard for you, Dad.
Please tell.
OK.

How many pairs of numbers
make a sum less that 5?
Hey there, Let’s see –
2+1 is less than 5,
so are 0+0 and so is 1+3 –
That’s 3 pairs so far.
Here’s a hint, Dad you see

An organized list
I must insist
An organized list
Is the way to persist

OK – let’s start with 0 – 0+4 and 0+3,
0+2 and 0+1 and 0+0 are all less than 5 –
That’s 5 pairs so far,
now, let’s start with 1.
1+3 and 1+2 and then 1+1,
and 1+0 – are all less than 5.
That’s 4 more pairs,
Next, let’s start with 2, 2+2 and 2+1 and 2+0.
They are all less than 5 – hey that’s 3 more pairs.

An organized list
I must insist
An organized list
Is the way to persist

Then, let’s start with 3 – 3+1 and 3+0 –
they are both less than 5 – hey, that’s 2 more pairs.
It’s so organized,
And there’s one more pair – 4+0.
Do you see a pattern Dad?
5 + 4 + 3 + 2 and + 1 – that’s 15 pairs, Tedi.
Your right dad how fun.

An organized list
I must insist
An organized list
Is the way to persist

You’re amazing, Dad –
are you ready for one more?
How many pairs of numbers
make a sum less that 10?
Aha! I see it. It must be
10 + 9 + 8 + 7 +6 + 5 + 4 + 3 + 2 + 1.

An organized list
I must insist
An organized list
Is the way to persist

An organized list
I must insist
An organized list
Is the way to persist