Welcome to Chapter 2, Lesson 2: Exploring Billions. Billions is a number that you have probably heard before, but you might not have talked about it much in math class yet. A billion is another name for one thousand millions (1 000 000 000) and it's a pretty big number. In this lesson, we're going to talk about something that we measure in the billions and that's the population of the world. This isn't going to be the typical five minute video, but you will need a pencil, paper and calculator for this lesson.
Welcome to Chapter 2, Lesson 3. We will continue to learn about large numbers in this lesson and we will also talk about estimating and rounding numbers. You won't need anything except your close attention for this lesson but I will ask you to answer two questions at the end of the video so be prepared!
In Chapter 2, Lesson 4 we continue to learn about large numbers, today we will look at the populations of some of the largest cities in Canada and compare them with each other. You will need a pencil and a piece of paper to answer a few quick questions in this MathCast.
For Chapter 2, Lesson 5 we will be solving a problem with large numbers. You will need paper, a pencil, and a calculator as I will be asking you to complete part of the problem.
In Chapter 2, Lesson 6 we will be learning about very small decimals - millionths. We use these decimals when we talk about "parts per million," or "ppm." You will often hear people talk about ppm when discussing the levels of poisonous material in something like water. Because a certain poison might be very strong, the allowable amount will be extremely small, or in parts per million. You won't need a pencil for this lesson but you will want to pay close attention!
Hello students. Chapter 2, Lesson 7 is a very practical lesson if you plan to ever travel to another country, which I hope you do someday! Every country has their own currency and each currency has a different value when you compare it to other countries' currencies. For instance, as of right this instant, one United States dollar is worth 1.03108 Canadian dollars (this is unusual, because the Canadian dollar is normally worth less than the US dollar).
You might be wondering: "How am I supposed to pay $1.03108 when the smallest coin I have is a penny?" Well, when bankers calculate the value of a currency, they want to be very accurate, so they use many decimal places. When it comes to you and me, though, we just round it to the closest penny, so $1.03108 would be $1.03 in the store.
Welcome to Chapter 2, Lesson 8, our last lesson of the chapter! In this lesson we are going to reinforce decimal numbers and how to place them on the place value chart. We are also going to compare decimal numbers smaller than one thousandth (0.001) to see how to tell which number is smaller or larger.
