Measurement and units (T3 W2)
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Measurement is the process of determining the size, length, or amount of something. In mathematics, we commonly use units such as meters for length, liters for volume, and kilograms for mass. It's essential to understand both the metric and imperial systems, as they are used in different contexts. For example, in South Africa, the metric system is predominantly used, where 1 meter equals 100 centimeters, and 1 liter equals 1000 milliliters.
Let's convert 2500 milliliters to liters. We know that 1 liter equals 1000 milliliters. To convert, we divide the number of milliliters by 1000. Therefore, 2500 milliliters divided by 1000 equals 2.5 liters. This example shows how to convert from a smaller unit to a larger unit by dividing.
Now, let's work on converting 5 kilometers to meters. Remember, 1 kilometer equals 1000 meters. To convert, we multiply 5 kilometers by 1000. What do we get? Yes, 5000 meters! Great job! Now, try converting 1500 grams to kilograms. Remember, 1 kilogram equals 1000 grams. What is the answer? Correct, it is 1.5 kilograms!
Now it's your turn to practice on your own. Convert the following measurements: 3.5 liters to milliliters, 1200 centimeters to meters, and 2.2 kilograms to grams. Show your working clearly. After you finish, we will review the answers together.
Answer: Meters
Meters are the standard unit of measurement for length in the metric system.
Answer: 2000 mL
Since 1 liter equals 1000 milliliters, 2 liters equals 2000 milliliters.
Answer: 1.5 kilograms
To convert grams to kilograms, divide by 1000. Therefore, 1500 grams divided by 1000 equals 1.5 kilograms.
Answer: Liters
Liters are the standard unit of measurement for volume in the metric system.
Answer: 1000
There are 1000 meters in a kilometer, which is the conversion factor.
Answer: 3200 milliliters
To convert liters to milliliters, multiply by 1000. Thus, 3.2 liters equals 3200 milliliters.
Answer: Kilograms
Kilograms are the standard unit of measurement for mass in the metric system.
Answer: 5 meters
To convert millimeters to meters, divide by 1000. Therefore, 5000 millimeters divided by 1000 equals 5 meters.