Project Math Access DVD 02 - Abacus- Part 04
Transcript Start
Audio Description: Part four; abacus logic method; division.
TEACHER: Let's move to division now. Alright, this is 1, 480/8. So I'm going to set 1,480, which is my dividend, all the way to the right. And I'm going to sets all the way to the... yeah, I think I did this wrong.
TEACHER: Okay, it‘s16,000.
PETER: 1e,ooo, not 1,ooo.
PETER: So 16, 480.
TEACHER: Yes
PETER: All the way to the right and 8 all the way to the extreme left, which is my divisor. And now 8 goes into 16,000, 2,000 times, so we're going to set our 2,000 in the one billions period. So we'll set 1,000 and now 8,... oh shoot. lt‘s 2,000. And 8 * 2,000 is 16,000.
TEACHER: Okay, correct.
PETER: So we can clear 16,000.
TEACHER: What's your new dividend?
PETER: Our new dividend is 480 (four- hundred and eighty).
TEACHER: 480 (four-hundred eighty)
PETER: Okay, 480 (four-hundred eighty).
TEACHER: Okay
PETER: 8 goes into 480, 60 times. And 8, going to set the 60, right there, in the ten millions period. And now...
TEACHER: Because this unit marker, the second unit marker is really your decimal of your quotient.
PETER: Yeah, okay. Now you're going to do 8 * 60... is 480.
TEACHER: So you're clearing it.
PETER: And you're clearing that, so now you can basically, if this is your decimal point, your answer's going to be 2,060.
TEACHER: Okay, now I'd like you to do a problem where there will be a remainder.
PETER: Okay, cool.
TEACHER: Your dividend is 109.
PETER: 109/2, so 109 I'll set to the extreme right, which is my dividend. And 2, all the way to the left, which is my divisor. So 2 goes into 100, 50 times. So I'm going to set 50 in the ten millions period, 50. And 2 * 50 is 100. And 2 goes into...
TEACHER: Your new dividend is?
PETER: My new dividend is 9.
PETER: And 2 goes into 9, 4 times. And I'll set 4 in the one millions period. And2*4is8, so clear 8 and whatever's leftover is going to be the remainder.
TEACHER: And your remainder always has to be...?
PETER: Always has to be all the way to the right.
TEACHER: Less than?
PETER: Your divisor.
TEACHER: Okay, then you know you're done.
PETER: And you clear your divisor and your final answer is 54 and the remainder is 1.