• 3 months ago
Transcript
00:00Hi kids, I came out here to mow the lawn, but I keep getting chased by this funny math
00:08symbol.
00:09I think if I can learn about the math symbol, it will leave me alone.
00:14Do you think you can help me learn about this math symbol and comparing numbers?
00:19Thank you so much, I really appreciate this.
00:22Uh oh, here he comes again.
00:28To start off learning, we are going to look at three symbols.
00:31Each one of these symbols are used to compare numbers.
00:35Some of these symbols may look familiar.
00:38For example, the sign on the bottom is an equal sign, and you have probably seen this
00:43before.
00:44Can you tell me what this symbol means?
00:48It means the same.
00:51That means whatever is on this side of the equal sign has to be the same as whatever
00:55is on this side for them to be equal.
01:00This symbol is the less than symbol.
01:02You can see how this symbol looks like a big alligator mouth.
01:07The less than symbol always has the big mouth facing the right side.
01:12The greater than symbol also has the same big mouth, but the mouth always points to
01:17the left.
01:19An easy way to understand these symbols and how we use them to compare numbers is to remember
01:23how we read.
01:25When we read a book, we read from left to right.
01:29We do the same when comparing numbers.
01:31We start from the left to right, and that helps us know which symbol to use.
01:36We are going to use these symbols to compare numbers.
01:41Here is the numbers 16 and 14, and we are going to compare the two numbers to see which
01:46symbol we should use.
01:47To help me compare, we are going to use base 10 blocks.
01:51The number 16 is made up of one 10 and six 1's.
01:55We have one 10's block, which represents the 1 in the 10's place, and six 1's to represent
02:00the 6 in the 1's place.
02:03For the number 14, how many 10's blocks do I need?
02:08I need just one 10's block.
02:11How many 1's blocks do I need?
02:14I need four 1's blocks.
02:16Great job, kids!
02:19Looking at these two numbers, which one is bigger?
02:24The 16 is bigger than 14.
02:26Knowing that 16 is bigger than 14, which symbol do we use?
02:33We use the greater than symbol.
02:35It helps to remember to read the problem from left to right.
02:39So we say 16 is greater than 14.
02:43The big mouth is always going to eat the bigger number.
02:48Here we have two more numbers to compare.
02:51We have 11 on the left and 11 on the right.
02:54To use our base 10 blocks to get 11, how many 10's blocks do we need?
02:591.
03:01Awesome job!
03:02Now how many 1's blocks do we need?
03:05We need just one of the 1's blocks.
03:08Now for the number on the right side, it is 11, just like the number on the left.
03:12So we use the same amount of blocks.
03:16Many of you probably already know which symbol we will use.
03:19Can you tell me the symbol?
03:23The equal sign!
03:24Great job, kids!
03:26Reading from left to right, we say 11 is equal to 11.
03:31Awesome!
03:34Here is the numbers 13 and 15.
03:37Go ahead and take a minute on your own to find out how many 10's and 1's blocks you
03:41will use with each number.
03:49The number 13 has one 10's block and three 1's blocks.
03:55The number 15 has one 10's block and five 1's blocks.
04:01Now to compare the numbers reading from left to right, which symbol will we use?
04:09We will use the less than symbol.
04:12Amazing!
04:1313 is less than 15 and we can easily see that with the blocks and the numbers.
04:21Today we learned all about comparing two numbers using these symbols.
04:24Keep on learning and we will see you next time.
04:27Goodbye!