Sal compares whole numbers written in expanded form, written form, and number form. Created by Sal Khan.
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- so 7907 is lessthanthe ader number(10 votes)
- jackie, you are correct, 7907 is less than 7970.
One way to show that something is "less than" something else (in mathematics) is to use the "
<" symbol. So, as Sal explains at1:07, when you use the "
<" symbol you are saying that the number on the left of the symbol is "less than" the number on the right. This means that you would write the comparison as:
7907 < 7970(27 votes)
- Who else thought this was really ez(13 votes)
- What is the difference between natural numbers and whole numbers? My 3rd Grade teacher only uses the word "natural numbers" but the title says " Comparing whole number place values" .(7 votes)
Compare the expressions on both sides of the question marks. So on the left-hand side of the question mark, I have 7,907. So, it's 7,000 plus 900 plus 7, which is going to be the same thing as 7,907. Now let's compare that to what we have on the right-hand side of the question mark. On the right-hand side, we have 7,000 plus 970, which is 7,970. Or if we wanted to expand it out, we could write that as 7,000 plus 900 plus 70, and then we have 0 ones. So if we compare place value by place value, we have 7,000 in either case. So the thousands place is the same. We have the same number of hundreds. We have 9 hundreds. But here we have no tens, and we have a 7. And here we have no ones, and we have 70. And clearly, 70 is greater than 7. So the number on the right is greater than the number on the left, or the number on the left is less than the number on the right. I always remember the less than symbol because it points to the smaller number, or either of these symbols point to the smaller number. So this right over here would mean greater than. You have the larger number on the left. This is less than. You have the smaller number on the left. So we would go with less than. This is less than that.