 grappling why do I need blessings gonna tell you slime slime floz మ్చు 2ఇట్,給 saya మ్చే మ్చేభ� الذي మ్చు 2మతు 2ఇోల్ మ్చు మ్ pendulum నేధ to estimate, compare and measure mass and subtract, multiply and divide masses, which are stated in decimal notation. Convert units in international system of mass using decimal notation and solve real life problems involving mass. Convert units in international system of mass using decimal notation and solve real life problems involving mass. Convert units in international system of mass using decimal notation and solve real life problems involving mass. Convert units in international system of mass using decimal notation and solve real life problems involving mass. Convert units in international system of mass using decimal notation and solve real life problems involving mass. Let's help Mr Lucas decide how many of these bags can he load on the cat for poor shorty to carry safely. Mr Lucas, you said the maximum weight that shorty can carry is 380 kg. That's correct. The maximum load or mass that shorty can carry is 380 kg. And each of these bags weighs 50 kg. As you can see here. Now, Lennis, if Mr Lucas load 3 bags of flour each weighing 50 kg on the cat, would shorty the horse be able to carry or to pull this cat? Will it be able to work out this mass? Let's try it on the same. See if he puts it on 50 kg. Yes, and that is 150 kg. 150 kg is much less than 380 kg, which he can carry. Okay, well done guys. Shorty will carry that. Okay, it's getting hot in the sun here. Let's go inside so I can tell you more about the different units we use to measure mass. The most commonly used unit of length which I used are these three. Tons, which is the biggest mass, abbreviated as a small t. Kyrgym, which is used the most often in daily life. And Kyrgym is abbreviated with kg. And grams, the smallest unit, which is abbreviated as small g. We can also change a number from one unit to another. And we call this convention of units. For example, we convert gram to kilogram. All tones to kilogram. Let's say we have 3242 grams of flour. This quite a lot, isn't it? And it's difficult to keep saying 3242 grams. It is better to convert this to kilogram. And this is how we do it. There are 1,000 grams in one kilogram. We can say add a decimal comma to the number and say it is 3242,0 grams. Now, when converting, we move a decimal comma behind the last digit forward by as many space as there are zeros in the number. I know this sounds tricky. Have a look at the graphic while I say it again. There are 1,000 grams in one kilogram. The number thousand has three zeros, right? So every time I'm converting kilogram to gram, I change the unit to gram. And remember to multiply by a thousand. When writing, this means that I move the comma three places to the right. Of course, when I convert from grams to kilogram, I have to move the comma three space to the left as the number will get smaller. So, to get back to our number, converting 3242 grams to kilogram, we move three places to the left. We get 3 kg and 242 grams. All more accurate. It is now 3.242 kilogram. It does get harder when the numbers get bigger. So remember the basic way to do it. For kilogram to gram, we multiply by a thousand. All move the comma three places to the right. And the opposite for gram to kilogram. We divide by a thousand. All we move three steps to the left. I again learn this. I learn this. Madam presenter, I can see you have quite a clever group of learners here. I wonder whether they can help me plan my next load too. What pleasure, sir. Well, they are quite clever Mr. Logas. What can we help you with? Well, you know the maximum load or mass that shorty can carry is 380 kilograms, right? Well, you see, tomorrow I have to go to the village to get some millies to come and sell here in town. Now I have only have to take one quarter of millies to bring here to town to sell. Because I also have other stuff that I need to bring along. So what do you think is the maximum load I should take of millies to bring here to town tomorrow? I would like you to help me to plan or to determine how much millies I can bring from the farm in kilograms. Okay. What do you think, team? A project for the job, what? Yes, most. All right. Yonathan, let's help Mr. Logas. Okay. Maximum load is 300 grams. And if Mr. Logas is 80 grams, one quarter of the millies divided by, of course, it is 95 kilograms. All right. Do you understand? Yes, most. Okay. What really happened here is that we have a quarter of Mr. Logas that he wants to go and get at his farm. And we have 380 kg. This one is a whole number. But to make it a fraction like the other one, we make it out of one. And off means times or multiply. So the one we have on top there will cancel the one under here. So we have 4 and 380. And now when we get to 380 divided by 4 giving us 95 kg. Thank you, Yonathan. Well, thank you, learners. Thank you, madam presenter. I will definitely write this up for my trip. Hmm, I smell lunch. Learners, let's continue with comparing and ordering measurements of mass. And while we do this, remember, for kilogram to gram, we multiply by 1000 or move the comma 3 places to the right. And the opposite for gram to kilogram, we divide by 1000 or move 3 spaces to the left. And also remember, when we compare measurements, we must make sure that we use the same units. This means that sometimes we need to convert from one unit to another before we solve the mathematical problem. Let's do one together, viewers. The masses of 5 learners' school bags are as follows. Hand-riner, 4.249 kg. Diner, 5.5 kg. Petrus, 4900 g. Amos, 5 kg. And Jonas, 4 kg and 750 g. The question is, whose bag is the heaviest? Now looking at those bags' weights. Firstly, we notice that some are in kilogram and some in grams. Before we can do anything else, we should convert them all to the same unit. It is simplest to convert to the smallest unit. Then later, convert the answers back to a bigger unit. I'll show you. Let's convert hand-riner's bag to gram. And it is 4249 g. Diner's is 5.5 kg. And it is converted to 5500 g. Amos's bag is easy. It is 5000 g. And Jonas's bag weighs 4 kg and 750 g. Which is converted as 4000 g plus 750 g. It weighs 4750 g. Let's compare now that all units are in gram And see whose bag is the heaviest. Now, it is easy, isn't it? It is clear that Diner's bag is the heaviest. It weighs 5500 g. Which is more than the other kids' bags. The lightest bag belongs to hand-riner. Lastly, viewers. Let's look at the four operations. Division, multiplication, addition and subtraction. With regards to mass. Don't worry. This is quite easy and straightforward. Firstly, division. We place the biggest number. The one to be divided into a little box like here. And the divisor, the four in front of the box. Now we divide four into six. Four goes into six one time. One times four is equals to four. We subtract four from six and two is left. Which we bring to the nine. Making it now 29. Four divides into 29 seven times. Seven times four is 28. So seven goes into the top. And the remaining one gets added with two. Meaning that we will now divide into twelve. Four divides into twelve three times exactly. Three times four is twelve. So that we have the answer. Four divided into 692 gives an answer of 173. Next, we will look at multiplication. Yeah, multiplication. First the rules. Look at the big number to be multiplied. We call this the multiplier. The smaller number by which we multiply is the multiplicant. The answer is called the product. Now let's calculate multiplication of this four digit number by a two digit number. The multiplier is 9,538 gram. Which we multiply by the two digit number 70. We write the biggest number in the first row. Which the multiplier 70 place vertically in the columns underneath the first two columns from the right. Multiplying 9,538 gram by 70 is quicker. Then multiplying 70 by 9,538 gram. Because 70 contains a zero which makes it easier. Immediately we can place a zero in the unit column on the right. Because we know that zero times all of the numbers in the first row will still yield zero. Now we work with the second number in the multiplicant namely seven. And again we multiply with the numbers from right to left in the first row. So seven times eight is 56. We place the six in the second digit position and carry over the five to the second digit position. The tens to add later. Seven times three is 21 plus the five we carried over gives 26. We place the six in the third digit position under the hundred where it belongs. And remember to carry over the two again to the five in the first row. Now we multiply seven by five and get 35 plus the two we carried over. So the seven goes to the fourth digit position under the thousands. And yes it was 37. So the three goes up to the nine to add up later. Seven times nine is 63 plus three. And the 66 is written in the column from the right to left in the last row. We see the answer is 667,660 grams. Now we move on to addition. Yay addition! Have you noticed viewers how much easier it makes the calculation when we have the numbers written in the correct place values? We calculate from right to left starting with the units on the place farthest to the right. Secondly we calculate the tens in the second place from the right. And lastly the hundred in the third place left from the units. So this calculation is not a problem at all, is it? We add up the unit numbers in the far right column followed by all the numbers in the tens column in the second position from the right. Then the hundreds in the third column from the right. The answer here is 296 grams. And finally the operation of subtraction all to minus. Yay subtraction! Again make sure that the numbers are written in the correct place value to make the calculation easier. The fourth place from the right after hundred in the third position is thousands. Again.