Video Transcript
On Monday, Isabella got two
stickers for her reward chart. And on Tuesday, she got three
stickers. On Monday, Mason got three stickers
for his reward chart. And on Tuesday, he added two
more. Who has more stickers?
This question is about two reward
charts for two different children, Isabella and Mason. Let’s look at Isabella’s reward
chart first. We’re told that on Monday, she got
two stickers for her chart. And if we look at the row for
Monday on Isabella’s chart, we can see those two stickers that she got. We’re then told that on Tuesday,
she got three stickers. And again, we can look on her chart
and we can see those three stickers.
Now, the question that we’re asked
at the very end of this is, who has more stickers? So let’s think about how we might
find the total of Isabella’s stickers. She started off with two on Monday
and then was given another three. So we’re going to need to find the
answer to two plus three. But before we do that, let’s have a
look at Mason’s reward chart. On Monday, he got three stickers
for his chart. And then we’re told that on
Tuesday, he added two more. So which two numbers are we going
to need to add together to find the total of Mason’s stickers?
He starts off with three and then
adds two more. Can you see something interesting
about these two additions? They both contain the same
numbers. They’re just added in a different
order, two plus three and then three plus two. Now, what do we know about numbers
if they’re added in a different order?
Well, they give the same total. It doesn’t matter which order we
add two numbers. Two plus three is the same as three
plus two. So if Isabella starts with two and
then counts on three, four, five, this is exactly the same as if Mason starts with
three and counts on another four, five. They both have five stickers. And so who has more stickers? They have the same number.
