Basic Operations on Whole Numbers
This lesson covers addition and subtraction of whole numbers, including how to align numbers by their place values. It also explains multiplication and division by 10, 100, and 1000, and introduces the use of the BODMAS rule for solving mixed operations.
- 00:56 “Number four, the learners should be able to multiply and divide by 10, 100, 1000, etc. Now, we go into the content of the topic. So we're going to start with addition and subtraction. When adding or subtracting numbers,...”
- 00:10 “Good day, everyone. My name is Mr. Akala. I'll be your mathematics teacher for today. And the topic before me is basic operations on all numbers. Again, basic operation on all numbers. The learning objectives are followe...”
- 09:44 “So ten minus nine becomes one. So what we have left is six minus zero. We have six. So the final answer is six thousand, one hundred and fifty seven. Then we also have what problem or big aspirations. So we're going to s...”
Careers and Applications in Chemistry
This lesson covers various career paths available for students studying chemistry, including roles in education, engineering, and health services. It also explains the applications of chemistry in food production, medicine, military, and environmental science.
- 05:29 “The various steps we take are scientists to solve problems. And the first step we are like to mention is observation. What is observation? The use of our senses to look at our environment. And see, oh, this is how things...”
Measures of Central Tendency
This lesson covers the measures of central tendency, including mean, median, and mode. Students will learn how to calculate these measures using given data sets. The lesson also explains how to handle data with and without frequency.
- 28:34 “all over 100, value of observation, and our p 20 now is going to be 20 n all over 100, and our n is 10, so we have 20 times 10 all over 100, so this is going to be the second value of observation, so p 20 is going to be...”
- 14:28 “What is your F? And what is your C? Where your I can only be 1, 2, 3. It means that, what does that mean? It means you can only find q1, q2, and q3 when you're talking about cotile. You cannot find 4th cotile. There's no...”
- 17:36 “cumulative frequency. So whenever we have a cumulative frequency in the table, such table is called cumulative frequency table. When we don't have a cumulative frequency table, it is only just a class and a frequency. We...”
Whole Numbers and Prime Factorization
This lesson covers the expression of whole numbers and decimal numbers in standard form. It includes finding prime factors of numbers up to 200, determining the least common multiple (LCM), and finding the highest common factor (HCF). Additionally, it addresses perfect squares and square roots using
- 20:00 “that's four, if I have three times three, three times three, that's nine, if I have four times four, that gives me 16, now, what the perfect square, the perfect square is the number that results from multiplying a whole...”
- 00:50 “of the class, the objective is the application of prime factorization, remember we did prime factorization before in the series 1, where we had to look at the factors of a given number, now we look at the application of...”
- 10:32 “the prime frustration method, you are expected to get the same answer, it becomes, it becomes an easy process to go, now, let's go to the next part, which is the HCM, the IS common factor, now the IS common factor is the...”
Factorization of Algebraic Expressions
This lesson covers the factorization of simple algebraic expressions and quadratic expressions. It includes methods for identifying factors and solving related word problems.
- 26:04 “It would be twice the number of girls, so that would be 120 times two. So, 120 times two, that would give us 240. So, when you had 240 plus 120, it would give you 360, total number of students in the school. What problem...”
- 21:57 “So you pick it up x plus 4, the one by the side, and I have x plus 4, I conclude. We done. Now, the last part of the factorization process is word problem. They're not giving an expression. Given the word form, how do yo...”
- 21:11 “Now, what have we done? You split it into 4. So these 2 and these 2 go. So we have between the and near ones, come on, break out, bring out the x. So we could have it as x, open the bracket, x plus 4. Between the and nea...”
Chemical Symbols and Formulae
The lesson covers the symbols of the first 20 elements and how to write chemical formulae and equations. It explains the differences between elements, compounds, and mixtures, as well as the concept of radicals and valency. The laws of conservation of mass and constant composition are also discussed
- 13:57 “And now you balance hydrogen. Check the atom count. You have 3 hydrogen A, you have 2 hydrogen A. The best I can balance this is, I put 2 A. Like I told you, you don't balance down. You don't balance by the soft grit. Yo...”
- 15:36 “4 N O, nitrogen 2 Z. Then you have 2 times this to give us 6 water. With this, you can check whether your equation is balanced or not by doing atom count. On the return side, on the return side, my nitrogen, my hydrogen,...”
Cost of Production
This lesson covers the concept of cost in economics, focusing on the cost of production. It explains different types of costs, such as fixed and variable costs, and discusses the factors of production that contribute to overall costs.
- 25:58 “okay, over changing quantity, anything marginal, the first line is always dash, you can see, here, for the first unit is dash, so you start from the second one, very easy, even without capital it or you can do this, just...”
- 30:30 “So you will give them the answer according to the demand of the question. The first one says as what output is AC at the minimum? This is your AC. What's the minimum AC up? Yes, five. Trace it to your quantity. Four. AC...”
- 27:33 “how you calculate it any time, any day, then, the question is actually, as what's output, is AC at the minimum, go back to the table, as what's output is AC at the minimum, look at it very well, look at it, take a look,...”