﻿(music plays)

Sarah stands next to a wall touch screen showing a two-column table and a multiplication example. She is in her mid-twenties, with short straight brown hair. She wears a blue T-shirt with a print that reads "Home Work Zone" and black tights.

She says HI, TVO KIDS,
I'M TEACHER SARAH,
AND TODAY, I'M GOING
TO SHOW YOU
HOW WE CAN USE
THE MATRIX METHOD
OF MULTIPLICATION
FOR TWO
DIGIT NUMBERS.
THE SAME RULES
APPLY.
OUR FIRST NUMBER.
TO MULTIPLY 15,
MULTIPLIED
BY 25.
SO I START
BY LOOKING AT
MY FIRST NUMBER,
AND I NEED TO
BREAK IT DOWN
INTO TENS AND ONES.
IF I TAKE A LOOK
AT MY 15,
I SEE THERE IS A
ONE IN THE TEN'S COLUMN,
AND THAT MEANS THAT
THE TOTAL VALUE
OF THAT
DIGIT IS WORTH TEN.
SO I WRITE MY TEN
RIGHT UP HERE.
NOW I NEED TO GO
ON TO THE NEXT DIGIT.
THE DIGIT IN THE
ONES IS A FIVE.
THE TOTAL VALUE OF
THAT DIGIT IS FIVE.
SO I WRITE MY ONES
VALUE RIGHT HERE.
NOW I'M GOING TO
MOVE ON TO MY 25.
I GET TO DO THE
SAME THING.
TAKE A LOOK AND
SEE WHAT NUMBER
IS IN MY TENS
PLACE.
I SEE I
HAVE A TWO.
I KNOW THAT
THAT MEANS
THAT DIGIT
IS WORTH 20.
NOW MOVING ON, I
LOOK AT MY ONES
AND I SEE THAT
THERE IS A FIVE.
SO I WRITE THE VALUE
OF MY ONES HERE.
THE NEXT
THING I DO IS
I MULTIPLY EACH
NUMBER AND
WRITE THE
PRODUCT IN THE COLUMN.
SO TEN, MULTIPLIED
BY 20,
I KNOW ONE
TIMES TWO IS TWO,
AND I KNOW THAT IF
I'M MULTIPLYING
BY TEN,
SO I KNOW THAT TEN
MULTIPLIED BY 20
IS GOING TO GIVE
ME A PRODUCT OF 200.

She writes the numbers in purple.

She continues NOW I DO THE SAME
THING HERE.
TEN MULTIPLIED BY
FIVE IS EQUAL TO 50.
I REPEAT THE SAME
PROCESS WITH
MY FIVE.
FIVE MULTIPLIED BY
20 IS EQUAL TO 100.
AND I KNOW THAT
FIVE MULTIPLIED
BY FIVE IS
EQUAL TO 25.
THE LAST STEP IS
THE PRODUCTS
THAT I HAVE IN EACH
OF MY BOXES.
SO I HAVE 200,
PLUS 100,
PLUS 50,
PLUS 25.
I KNOW THAT 200 PLUS
100 IS 300,
300 PLUS 50 IS
350, AND 350 PLUS 25
IS EQUAL TO
375.
SO THERE YOU
HAVE IT, TVO KIDS.
USING THE MATRIX
MULTIPLICATION
METHOD FOR
TWO DIGIT NUMBERS -
15 MULTIPLIED BY 25
IS EQUAL TO 375.
SEE YOU
NEXT TIME!