Counting in Binary
This lesson teaches how to count using the binary system, which uses only the digits zero and one. Students will learn to represent numbers in base two and understand the place values associated with binary digits. Activities include grouping counters to illustrate binary numbers.
- 02:33 “We use this paper abacost to improvise. I don't know if you've seen an abacost in real life. We have 8, fours, twos, then units. Okay, then we have one here, nothing here, one here, one here. I would like us to do this t...”
- 06:26 “So we write one in four. We don't have any four. We already have eight. We don't have four. So we leave this space open or put zero. Then in two, we don't have two. We have zero. Then we have one. We have one. So okay, l...”
- 04:52 “One, two, three, then four. Then I have one left. Okay, let's continue the activity. Then next one now is to group them in eight, four, two, and units. Okay, let's see, let's do that now. We've grouped this into, now let...”
Simplification of Algebraic Expressions
This lesson covers the definition of algebraic expressions and their components, including terms and coefficients. It explains how to identify like terms, perform arithmetic operations on similar terms, and simplify expressions by inserting or removing brackets.
- 05:34 “You can as well be, for example, for four apples. Instead of just one plus one plus one, you can still say four times one apple. It is the same thing. It gives you the same four apples. So that means, apple in four place...”
- 04:44 “you're lent to hard or subtract objects, you lent that, for example, one apple plus one apple plus one apple plus one apple can be written as four apples. That is one apple, one apple plus another one. Let me represent i...”
- 19:12 “plus 4 times 2. In other words, 4 groups of 3 plus 2 is the same as 4 groups of 3 plus 4 groups of 2. For example, we expand this expression. 3 into brackets 2a plus b. Now with expansion and the distributive law, this i...”