Project Math Access DVD 02 - Intermediate Grade Levels- Part 03
Transcript Start
Audio Description: Part three; estimation.
TEACHER: Let's take a look at this. $1.61 is between what two dollars?
ALI: 160 and 170
TEACHER: You're thinking of tens; you're getting ahead of me.
ALI: 1 and 2
TEACHER: |t‘s between 1 and 2. Is it closer to $1 or $2?
ALI: $2
TEACHER: It‘s closer to $2. Okay, good. Now let‘s take this further; let‘s take our estimating a little further and work a little harder here. We've got 161, 161. 61 is between what two tens?
ALI: 60 and 70
TEACHER: Okay, we want to round to a ten because tens are easier to work with. So let's take a look at our ones column; we've got a 1. If it's a 4 or lower you round...?
ALI: down
TEACHER: down, if it's a 5 or higher, you round... up. Okay, so we've got a1 in that ones column. 161, would it round to 160 or 170?
ALI: 160
TEACHER: Okay and we've got a secret 1. I want you to put your secret 1 up here for me.
Audio Description: Ali puts the cube from the ones slot outside of the tray.
TEACHER: Okay, so our estimate, it was 161, but $1.61 is pretty close to what, Ali?
ALI: $1 and 60 cents.
TEACHER: $1 and 60 cents, okay. You go to the store and your total comes to $1.61. You hand the cashier $2. I need you to write $2 down for me so you don't forget, okay?
ALI: minus 2,0,0
TEACHER: No, go down to the next line right now and write $2.
ALI: Do I need to cursor over?
TEACHER: You can move the cursor over, sure.
ALI: Ah, dollar sign?
TEACHER: umhum
ALI: dollar sign, 2, point, 0, 0
TEACHER: Okay