Metric Measurements, Fractions and Number Lines
Students will be able to calculate fractions of metric units using number lines.
- Ask, “What two numbers can we multiply together to get 100?” Note how these are called factors of 100.
- Mention to your class that any factor for a given number divides that number evenly.
- Demonstrate by writing a multiplication fact family for 100 as: 4 x 25 = 100, 25 x 4 = 100, 100/4 = 25. Hence, 4 and 25 divide 100 evenly.
- Allow your class to think, pair and share their thoughts on any other factors for 100.
- Have your students share whole class, confirm and post the factors for 100 as: 1, 2, 4, 5, 10, 20, 25, 50, 100.
- Tell your students that finding factors, will be one strategy used to find fractions and equivalent measurements to 100.