Idea 20of 24Builds onAdd fractions with the same bottom numberFrom improper fraction to mixed number
When a sum goes past one whole
What is 3/4 + 3/4?
Today you'll discover
- why a sum can pass 1
- how to fill a whole first
- how to write the sum two ways
Think first3/4 of one pizza and 3/4 of another
What is 3/4 + 3/4?
Decide first, then press Next. Fill one whole before you go on.
Two pizza bars, each with three of four parts shaded. The parts are counted, then slide together into a bottom bar of two wholes: one full whole, with a bracket, and two fourths in the next. Then 3/4 + 3/4 = 6/4 = 1 2/4 is written. The last step shows two cakes in sixths.
See the whole ideathe big idea and the key word, in one place
The big idea
When a sum passes one whole, rename it: 6/4 is 1 whole and 2/4, or 1 2/4.
In the kitchenTwo 3/4-cup scoops of oats: 6/4 cups, which is 1 2/4 cups, the same as 1 1/2 cups.
Easy to get wrong6/4 and 1 2/4 are both right: two names for one amount. 1 2/4 can also be written 1 1/2.
Key word
- regroup
- put parts together to make a whole: 4 fourths regroup into 1
Ready to use it?
- Add fractions whose sum is more than 1.
- Write a sum as a mixed number.