Video Transcript
Fill in the blanks: 987 equals what
hundreds plus what tens plus what ones.
In this question, we need to think
about this three-digit number. Can you read it? It’s 987. And if someone was asked, “What
parts is the number 987 made up of?,” and they said, “Well, well it’s made up of
nine plus eight plus seven,” what would you say to them? Well, hopefully you know that
although our number is made up of the digits nine, eight, and seven, they’re not
worth nine, eight, and seven, are they? In a three-digit number, the three
digits are worth hundreds, tens, and ones.
Can you see the words hundreds,
tens, and ones in our answer? Let’s draw a place-value table to
help us think about what the hundreds, tens, and ones are in our number. Let’s start by putting the digits
of our number in the table, 987. Now we can use this to help us fill
in the blanks. How many hundreds do we have? There are nine hundreds in our
number, and that’s why if we wanted to split our number into parts, we wouldn’t
write nine. We write the value of nine
hundreds, which is 900. How many tens are there? We can see the digit eight in the
tens column, which shows that our number has eight tens. The eight in 987 isn’t worth
eight. It’s worth eight tens or 80. And finally, the digit in the ones
place is a seven. Our number has seven ones, and
seven ones are just worth seven.
If we look at our part–whole model,
this looks a lot better, doesn’t it? 900 and 80 and seven go together to
make 987. Let’s read through our completed
sentence together. 987 equals nine hundreds plus eight
tens plus seven ones. Our missing digits are nine, eight,
and seven.
