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Maths Lesson- Comparing and Ordering Numbers

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Hey! What are these numbers on the trees? And where is Buzz? We are playing a game Amber. Buzz is hidden behind one of these trees. You can find him by answering the questions that I'll be asking you. OK. Can I know the rules? Sure. The numbers on these trees are the answers to the questions. Of course they are in a jumbled manner, whenever you will give a correct answer and if Buzz is behind the tree with that answer he will come out. Oh cool! Let's start then. Okay! So my first question is, Which number comes before 252? The number before 252 is 251. Which number comes before 62? The number before 62 is 61. Correct! Now let me ask you the third question. Which number comes after 55? The number after 55 is 56. Buzz is not behind this tree too. No problem. Now let me ask you the next question. Which number comes after 191? The number after 191 is 192. Now only one tree is left. Which number comes between 398 and 400? The number is 399. Waaow! Amber you are learning fast. Hey Buzz I finally found you. You surely did Amber. Great job! Hey Buzz! What are these cards for? Are we playing another game? Ha ha ha ha! No Amber. Some numbers are written on these cards. I'll teach you how to choose the largest of the given numbers. Okay! Now we have to choose the largest of the numbers. 93 92 and 94. We start with comparing the first digit of each number. Here the first digit of all the 3 numbers is 9 since first digit is same in all the numbers we move to the second digit. The second digit of the first number is 3. Let's compare this with second digit of the second number, which is 2. We know 3 is bigger than 2. So, the number 93 is bigger than 92. Now, let's compare the second digits of the numbers 93 and 94 and find the largest of the two. The second digit of 93 is 3 Let's compare this with second digit of 94 which is 4. We know 4 is bigger than 3. So, the number 94 is bigger than 93. So, 94 is bigger than 92 also. And the largest of the three numbers is 94. This method can be used when you are not sure about the order of numbers. Another method to find largest of the numbers is to find order of the given numbers. For example, the number 93 comes after 92. And number 94 comes after 92 and 93. So, we know that 94 is the largest of the three numbers. Now Amber, can you try for the next three cards? Oh sure! We start with comparing the first digit of each number. Here the first digit of the number on the first card is 5. And the first digit on the other two cards is 6. Then, 6 is bigger than 5 the number 640 and 645 are bigger than 545. Now, let's compare the numbers on second and third card. The second digits of the numbers are same too that is, 4. Now what to do Buzz? No problem Amber. In such cases, you have to compare the third digits also. So, after comparing 0 and 5 we know 5 is bigger than 0. So, 645 is bigger than 640. So, the number 645 is the largest of the three numbers. That was good Buzz. Thank you. You are welcome Amber. Now, let's see how to find the smallest number, of the given numbers. OK. We have to choose the smallest of the numbers from 50, 42, and 32. Let's check the orders of the numbers. The number 32 comes before 50 and 42. And so 32 is the smallest number. Now check for the next 3 cards Amber. Let me check the digits of every number. The first digit of every number is same that is, 7. The second digit of the number 754 is 5. The second digit of the number 762 is 6. And the second digit of the number 732 is 3. As 3 is smaller than 5 and 6 the number 732, is smallest. Let's see how to compare numbers. We use some symbols to compare numbers. Amber can you tell me what are these symbols? Sure. The first symbol is greater than. The second symbol id less than. The third symbol is equal to. Great job Amber! Now let us compare some numbers. Now compare these 2 numbers. Remember that we refer to the number on the left hand side of the box. OK. 14 is smaller than 34. So, we use this symbol 'less than' here. Good! Now compare these numbers. The number 425, comes after 415. So, it is the bigger number. So we use this symbol 'greater than' here. OK. How about these numbers? These numbers are same. So, the symbol 'equal to' should be used here. That's right Amber. But there is one more symbol we use for comparison. It's called the 'not equal to' symbol. So when 2 numbers are not same we can use this symbol. This pond is the shortest way to Betty's place. Hmm. I can just fly over the pond and cross it. Let's find the way for you to cross. Hello friends! I am Kroki. I can tell you a simple way to cross this pond. Oh thanks Kroki. I am Amber. Can you tell me the way? Sure. But first you have to arrange some numbers on the leaves. They will form a bridge for you to cross the pond. Waow that sounds fun! Come on let's start. Do you know what is ascending order of numbers? Yes. It is increasing order of numbers. that is arranging numbers from small to big. Very good. Then arrange these numbers on the leaves in ascending order. OK. The smallest of these numbers is 25. So it should come first. Next should be 34. Next should be 42. Then it should be 50. And the last should be 61. So the numbers are arranged in the ascending order. That's good. And what is descending order? It's the opposite of ascending order that is arranging numbers from big to small. Very good Amber! Now just jump on the leaves and cross the pond. Thanks Kroki. You were great help. You are welcome Amber. Have a nice day! Waow Amber! You did a great job. Thanks Buzz. Thanks for teaching me so many new things today. I had great fun. No problem Amber. Let's quickly revise the concepts. #

Video Details

Duration: 13 minutes and 1 second
Language: English
License: Dotsub - Standard License
Genre: None
Views: 23
Posted by: schoogle on Dec 30, 2015

Maths Lesson- Comparing and Ordering Numbers

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