(music plays)

Sarah stands next to a wall touch screen showing a word problem, 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 HEY,
TVO KIDS,
I'M TEACHER SARAH,
AND TODAY,
I'M GOING TO
TEACH YOU A NEW WAY
TO MULTIPLY, USING
A MATRIX.
THIS IS A
REALLY SIMPLE,
EASY WAY TO DO
MENTAL MATH.
LET'S GIVE IT
A SHOT TOGETHER.
SO FOR EXAMPLE,
I HAVE
MY MULTIPLICATION
QUESTION, WHICH IS 55
MULTIPLIED BY
EIGHT.
SO NOW I NEED TO
FIND THE PRODUCT.
IN ORDER TO USE
THIS METHOD,
THE FIRST THING
I HAVE TO DO IS
BREAK MY NUMBERS
DOWN BY USING
PLACE VALUE,
OR THINK ABOUT
THE TENS COLUMN AND
THE ONES COLUMN.
LET'S START
WITH MY 55.
IF I TAKE A LOOK
AT MY 55,
I KNOW THAT
THIS FIVE IS IN
THE TENS COLUMN,
AND THAT
THAT
REPRESENTS 50.
SO I'M GOING TO
WRITE THAT
VALUE
RIGHT HERE.
NOW I'M GOING TO
TAKE A LOOK
AT THE
ONES COLUMN.
I SEE THERE'S
A FIVE IN
THE
ONES COLUMN,
BUT THAT FIVE ONLY
REPRESENTS FIVE.
I'M GOING TO
WRITE THAT NUMBER
RIGHT HERE.
NOW I CAN MOVE ON
TO MY NEXT NUMBER.
EIGHT.
THIS ONE'S
EASY.
EIGHT IS ALREADY
IN THE ONES PLACE,
SO I SIMPLY WRITE MY
NUMBER DOWN HERE.
THE NEXT THING
THAT I HAVE TO DO
IS I HAVE TO MULTIPLY
THE NUMBERS
TOGETHER AND
WRITE MY PRODUCT
IN THE
COLUMN.
SO 50 MULTIPLIED
BY EIGHT.
I KNOW THAT EIGHT
TIMES FIVE IS 40,
AND WHEN I'M
MULTIPLYING BY TENS,
I CAN ADD
MY ZERO.
SO IF EIGHT
TIMES FIVE IS 40,
THEN EIGHT TIMES
50 IS 400.
WRITE THAT
NUMBER HERE.
PERFECT.
NOW I DO THE SAME
THING FOR
MY
NEXT COLUMN.
I MULTIPLY FIVE
BY EIGHT,
WHICH
IS 40.
WRITE IT DOWN
IN HERE,
AND I AM
ALMOST DONE.
THE NEXT THING THAT
I HAVE TO DO
IS SUM UP, OR
ADD UP ALL OF MY
NUMBERS IN MY
COLUMN.
SO I HAVE
400 PLUS 40,

She writes the steps mentioned in purple and continues AND THAT GIVES
ME AN ANSWER,
OR A
PRODUCT OF 440.
SO 55 MULTIPLIED BY
EIGHT IS 440.
THERE YOU
HAVE IT, TVO KIDS,
A NEW WAY TO DO
MENTAL MATH,
USING
A MATRIX.
SEE YOU NEXT
TIME!