Writing Fractions with Common Denominators
1. Finding multiples of a number.
- Enter a number in the input box for the first denominator, for example 3.
- Click repeatedly on the Add Parts button. Notice what is the number of New Parts when the green light appears and try to predict when it will appear again
- Enter numbers in the boxes for both denominators, for example 4 and 6.
- Click repeatedly on the Add Parts button. Notice what is the number of New Parts when both green lights are on.
- Continue to add new parts until both lights are on again.
- Discuss the significance of the first appearance of both green lights.
- Discuss the significance of the number of new parts in each original division when both green lights are on.
- Enter two fractions, for example, 3/4 and 1/6.
- Click repeatedly on the Add Parts button until you find the LCD.
- Enter two numbers in the input boxes for the numerators so that the two new fractions are equivalent to the original fractions and have the same denominators.
- Add more new parts until you find another common denominator. Enter the numerators of the equivalent fractions using this new denominator.