Teacher Charmain stands in front of a big screen. On the screen, a place value chart appears with columns from left to right that read "Hundreds, tens, ones, decimals, tenths, hundredths, thousands." A sum in the columns reads 235.246 plus 521.947.

Teacher Charmain is in her twenties, with brown hair in a low ponytail. She wears jeans and a blue Homework Zone T-shirt.

She says HI, TVO KIDS.
IT'S TEACHER
CHARMAIN HERE.
WE'RE GOING TO ADD
SOME LARGER NUMBERS
BUT THIS TIME
WITH DECIMALS.
AND WE'RE GOING TO ADD ALL
THE WAY TO THE THOUSANDTHS.
SO I'VE GOT TWO NUMBERS HERE
THAT I WANT TO ADD TOGETHER.
SO LET'S TRY IT TOGETHER.
SO I HAVE 235 AND
246 THOUSANDTHS.
THAT'S ONE NUMBER.
AND I'M GOING TO ADD THAT
TO 521 AND 947 THOUSANDTHS.
THOSE ARE TWO FAIRLY
LARGE NUMBERS.
I'M GOING TO START OFF
BY PUTTING A LINE HERE
SO I KNOW THAT ANYTHING THAT
COMES UNDERNEATH THAT IS
GOING TO BE PART OF
MY SUM, MY ANSWER.
AND I'M USING A PLACE VALUE
CHART SO IT REMINDS ME
OF WHICH PLACE VALUE
THAT I'M WORKING IN
SO I DON'T GET MY
NUMBERS MIXED UP.
BECAUSE WE HAVE TO
ADD THE SAME DIGITS
IN THE SAME PLACE
VALUE TOGETHER.
SO LET'S START OVER IN THE
THOUSANDTHS COLUMN BECAUSE
THAT'S THE ONE THAT'S FURTHEST
OVER THAT WE HAVE TO START
ADDING WITH.
SO I'VE GOT SIX AND SEVEN,
AND WHEN I ADD THAT TOGETHER
I GET THIRTEEN.
SO I'M GOING TO PUT THE
THREE HERE, BUT THE TEN FROM
THE THIRTEEN I'M
GOING TO CARRY OVER
TO THE HUNDREDTHS
PLACE VALUE.
SO THAT ONE ACTUALLY REPRESENTS
TENTHS OF THAT PLACE VALUE.
NOW I'M GOING TO ADD THESE
THREE DIGITS TOGETHER.
ONE PLUS FOUR IS FIVE,
AND FIVE PLUS FOUR IS NINE.
SO I'M GOING TO
PUT THAT HERE.
THEN I MOVE OVER TO
THE TENTHS COLUMN,
AND I HAVE TWO PLUS NINE.
WELL, TWO PLUS NINE IS ELEVEN,
SO I'M GOING TO PUT THE ONE HERE
AND THEN I HAVE TO CARRY THAT
TEN FROM ELEVEN OVER TO
THE ONES COLUMN.
NOW I NOTICE HERE I'VE
GOT MY DECIMAL COLUMN
WHERE I'VE GOT
MY TWO DECIMALS.
WELL, I'M JUST GOING TO
PUT A DECIMAL HERE IN MY SUM
BECAUSE IN ADDITION IT STAYS
IN EXACTLY THE SAME PLACE.
THERE'S NO MOVING INVOLVED.
SO NOW I CAN CONTINUE ON, AND
I'M GOING TO MY ONES COLUMN.
SO I'M GOING TO ADD MY ONE
PLUS FIVE, WHICH IS SIX,
AND SIX PLUS ONE,
WHICH IS SEVEN.
AND THEN MOVING OVER
TO MY TENS COLUMN...
WE'RE ALMOST THERE.
THREE PLUS TWO,
WHICH IS FIVE.
AND THEN, FINALLY, MY HUNDREDS
COLUMN, TWO PLUS FIVE,
WHICH IS SEVEN.
SO MY FINAL SUM OR ANSWER IS
757 AND 193 THOUSANDTHS.
WHEW, WE DID IT.
GOOD JOB.
DON'T FORGET, WHEN YOU'RE
ADDING, MAKE SURE YOU
PUT YOUR NUMBERS IN
THE RIGHT PLACE VALUE,
AND YOU LINE IT UP BASED ON THE
DECIMAL WHEN YOU'RE ADDING.
SO NOW YOU KNOW
HOW TO DO IT.
DON'T FORGET
TO PRACTISE.
GOOD JOB, TVO KIDS.