﻿(music plays)

Shahana stands next to a wall touch screen with colourful numbers. She is in her twenties, with shoulder-length brown hair. She wears a blue T-shirt with a print that reads "Home Work Zone."

She says HI,
TVO KIDS,
I'M TEACHER
SHAHANA
AND I'M HERE
TODAY TO SHOW YOU
HOW TO ROUND
NUMBERS.
LET'S GET
STARTED WITH
A PROBLEM.

She clicks on a top menu and a word problem appears. It reads "This March my family is planning a road trip to a few cities in the United States. The driving distance from Toronto to our first destination, New York City, is 789 kilometers. From there we want to drive to Washington D.C. which is another 367 kilometers. The final stretch back to Toronto is 793 kilometers. About how many kilometers will end up driving in total to get from Toronto to New York City to Washington D.C. and back?"

She continues NOW BEFORE WE
BEGIN TO
SOLVE
THE PROBLEM,
LET'S HIGHLIGHT
SOME OF
THE KEYWORDS
THAT WE SEE.
THE FIRST
IMPORTANT WORD THAT
I SEE IN THIS
PROBLEM
IS TOTAL.
TOTAL TELLS ME
THAT I HAVE
TO USE
DISTANCES.
I ALSO SEE
THIS WORD OVER HERE,
THAT THEY
DON'T WANT AN
EXACT NUMBER AS
MY FINAL
THEY WANT A
NUMBER THAT'S
AROUND THAT,
SO HOW DO WE FIND
OUT WHAT THAT
NUMBER IS?
WELL, WE CAN
USE ROUNDING.
LET'S GIVE IT
A TRY.
THE FIRST STEP
IS TO CALCULATE
SO IF YOU
NOTICE OVER HERE,
THE DISTANCES,
AND GOT A TOTAL
1,949 KILOMETRES,
AND THAT'S
THE ACTUAL
OR EXACT
DISTANCE THAT MY
FAMILY WOULD HAVE
TRAVELLED.
OKAY,
BUT THE
PROBLEM TOLD US
THAT WE SHOULD
HOW MANY
KILOMETRES MY
FAMILY TRAVELLED,
SO THAT'S WHERE
WE NEED
TO ROUND.
THERE ARE THREE
DIFFERENT WAYS
WE COULD
ROUND THE NUMBER.
WE COULD ROUND IT
TO THE NEAREST
TEN, NEAREST
100 OR THE NEAREST
1,000.
LET'S START
BY ROUNDING OUR
NUMBER TO THE
NEAREST TEN.

She clicks and a four-column table appears. The columns read "Thousands, Hundreds, Tens, Ones."

She continues FIRST THING
I'LL DO IS WRITE
IN MY NUMBER INTO
MY PLACE VALUE
CHART
OVER HERE.
1,949.
OKAY, AND WHAT
I'LL DO IS
I'M GOING TO
CIRCLE THE DIGIT
IN THE PLACE
VALUE THAT
I'M
ROUNDING TO.
SO IN THIS
CASE,
WE HAVE
TO ROUND IT
TO THE NEAREST
TEN.
SO I'M
GOING TO CIRCLE
THE DIGIT IN THE
TENS PLACE VALUE.
UNDERLINE THE DIGIT
BESIDE IT AND
WE CAN
REMEMBER A LITTLE
ROUNDING RHYME IN
ORDER TO
HELP
US HERE.
IF THE UNDERLINED
DIGIT IS FIVE
MORE,
RAISE THE SCORE.
WHAT THAT MEANS IS
THAT WE HAVE
TO RAISE THE
CIRCLE DIGIT BY ONE,
WHICH MEANS
THIS WOULD
BECOME
A FIVE.
IF THE UNDERLINED
DIGIT IS FOUR
OR LESS, WE
LET THE CIRCLE
DIGIT REST.
IN
OTHER WORDS,
WE JUST LEAVE
IT AS IS.
IN
THIS CASE,
WE'RE GOING TO RAISE
OUR CIRCLE DIGIT
BY ONE,
SO THE FOUR
BECOMES A FIVE,
AND WE REWRITE
THE NUMBER,
EXCEPT
THIS TIME,
EVERYTHING AFTER
THE CIRCLED
DIGIT
BECOMES A ZERO.
SO IF WE ROUNDED
1,949
KILOMETRES TO
THE NEAREST TEN,
WE'D GET
1,950.
LET'S TRY IT
AGAIN BY ROUNDING
TO THE NEAREST
HUNDRED.

The chart clears.

She continues OKAY, THIS
TIME AGAIN,
I'M GOING TO WRITE
MY NUMBER
INTO THE
PLACE VALUE CHART.
NOW WE'RE ROUNDING
TO THE NEAREST
HUNDRED,
SO I'M GOING TO
CIRCLE THE DIGIT
IN THE HUNDREDS
PLACE VALUE,
UNDERLINE THE
DIGIT BESIDE IT.
FOUR MORE, WE'RE
GOING TO
LET
THIS REST.
SO WE LEAVE IT
JUST AS IT IS,
AND THEN
RE-WRITE THE NUMBER,
EXCEPT EVERYTHING
AFTER THE
CIRCLE DIGIT
BECOMES A ZERO.
SO ROUNDING THAT
NUMBER TO THE
NEAREST HUNDRED
BECOMES 1,900.
AND FINALLY,
ROUNDING TO THE
NEAREST
THOUSAND.
THIS IS PRETTY
EASY SO FAR.
WE'RE GOING TO
PUT OUR NUMBER
INTO THE PLACE
VALUE CHART.
ONCE AGAIN,
CIRCLE THE
DIGIT IN THE PLACE
VALUE THAT YOU'RE
ROUNDING TO,
UNDERLINE THE
DIGIT BESIDE IT.
THE UNDERLINED DIGIT
IS FIVE OR MORE,
SO WE'RE GOING
TO RAISE THE SCORE.
ONE OVER HERE,
BECOMES A TWO,
AND EVERYTHING
AFTER IT BECOMES
A ZERO.

A conclusion screen appears.

She continues OKAY,
SO TO SUM UP,
THESE ARE THE NUMBERS
THAT WE ROUNDED.
THIS WAS
IF YOU
NOTICE,
THE HIGHER
THE PLACE VALUE
THAT YOU
ROUND TO,
THE FURTHER
GETS FROM THE
SO IF THE QUESTION
DOESN'T TELL YOU
WHAT NUMBER TO
ROUND TO, YOU DECIDE.
WE CHOOSE,
FOR
OUR PURPOSES,
LET'S CHOOSE TO
ROUND TO
THE
NEAREST TEN.
SO AS MY
WHAT I CAN
SAY IS THEN THAT:

A blue caption reads "My family will drive about or approximately 1,950 kilometers in total on the trip."

She continues OKAY, SO THANKS FOR
WATCHING TVO KIDS.
I'M TEACHER
SHAHANA AND THE
NEXT TIME YOU
ROUND,
DON'T FORGET
OUR ROUNDING RHYME:
FIVE OR MORE, RAISE
THE SCORE,
FOUR OR
LESS, LET IT REST.