Teacher Robyn stands in a studio next to a large touchscreen. She has long blond hair and wears glasses and a blue shirt with a print that reads "Homework zone."

A chart appears on the large touchscreen. The columns read "Hundred thousands, ten thousands, thousands, hundreds, tens, ones."

A caption reads "Teacher Robyn."

Robyn says HI, TVOKIDS.
I'M TEACHER ROBYN.
LET'S TALK ABOUT
MULTIPLYING
A TWO-DIGIT NUMBER
BY POWERS OF TEN.
TODAY WE'LL USE
TEN, ONE-HUNDRED,
AND A THOUSAND.
THE EXAMPLE TWO-DIGIT
NUMBER WE'LL USE
IS FIFTY-FIVE.
I LIKE TO USE A PLACE-VALUE
CHART TO HELP ME.
SO, HERE WE GO.
WE'VE GOT A FIVE
IN THE TENS,
AND A FIVE
IN THE ONES.

She writes 5 in tens and 5 in ones, then says
I'M GOING TO SHOW YOU
A REALLY EASY TRICK
FOR MULTIPLYING
BY POWERS OF TEN.
LET'S START BY TEN.
I SEE THAT TEN
HAS ONE ZERO.
I'M JUST GOING TO PUT A
ZERO IN THE ONES' COLUMN,
AND I'LL MOVE MY
FIFTY-FIVE OVER.

She writes 5 in hundreds, 5 in tens and 0 in ones, forming the number 550.

She says SO, FIFTY-FIVE
TIMES TEN
IS FIVE-HUNDRED
AND FIFTY.
LET'S TRY IT AGAIN
TIMES A HUNDRED.
NOW I HAVE TWO ZEROS.
SO, I'M GOING TO PUT
A ZERO IN THE ONES,
A ZERO IN THE TENS,
AND NOW I'LL ADD
MY FIFTY-FIVE.

She repeats the process adding two zeroes to form the number 5500.

She says LET'S SAY I WANTED
TO ADD ANOTHER ZERO
AND MULTIPLY BY
ONE-THOUSAND.
WELL, I SEE NOW THAT
I HAVE THREE ZEROS.
SO, I'M GOING TO START
AT THE ONES' COLUMN
AND ADD THREE ZEROS,
AND THEN PLUG IN
MY FIFTY-FIVE...

She repeats the process with 3 zeroes, forming 55000.

She says FOR A TOTAL OF
FIFTY-FIVE THOUSAND.
HOPE THAT TRICK IS
REALLY HELPFUL.
GOOD LUCK.