Number sense and place value reasoning | 4th grade math (Illustrative Math-aligned) | Khan Academy

- [Tutor] We're told, "The list below

shows 3 clues about a number,"

and they say, "Which of these numbers

could be the number described?"

So why don't you pause this video,

and try to do this before
we do this together?

Okay, now let's do this together.

So the first clue is the
number is greater than 43,215.

So let's see which of these
numbers are greater than 43,215.

So they all have four 10 thousands,

so that doesn't help us much.

But if we go to the thousands place,

this one only has two thousands,

so it's not greater, this
is 42,000 and something,

so it's definitely less
than 43,000 and something.

So we can rule this one out,

just phrase it on that first clue.

Now these second two, this
is 45,000 and something,

and 46,000 and something,

so it's definitely larger
than 43,000 and something.

So we've used that first clue,

we have it down now to two numbers.

The second clue, the
number is less than 47,890.

Well, both of these,

this is 45,000 and something,
this is 46,000 and something,

so they're both less than
47,000 and something,

so this isn't really helping us that much.

Now let's look at this last clue.

The number has a six
in the hundreds place.

So the hundreds place, this
is one, tens, hundreds,

six in the hundreds
place, I like Choice B,

ones tens, hundreds,

this does not have a six
in the hundreds place,

we rule that one out, and B is our answer.