Idea 11of 22Builds on4 ÷ 1/3: how many thirds fit in 4?
Same pieces in every whole
How can you find 3 ÷ 1/4 without counting one by one?
Today you'll discover
- how many quarters fit in one whole
- why more wholes hold times as many
- a quick way to divide by a unit fraction
Think first4 quarters fill one whole
4 quarters fill one whole. How many quarters fit in 3 wholes?
Decide first, then press Next. Look at one whole, then at all of them.
Three bars, each one whole, cut into quarters, with a single quarter set apart underneath. At the right of each bar: 4 quarters. Then the quarters numbered 1 to 12 and the sentence 3 ÷ 1/4 = 12. The last step shows 5 wholes cut into halves.
See the whole ideathe big idea and the key word, in one place
The big idea
One whole holds 4 quarters, so 3 wholes hold 3 times as many: 3 ÷ 1/4 = 12.
Thirds1 whole holds 3 thirds, 2 wholes hold 6, 4 wholes hold 12. Every extra whole adds the same 3 thirds.
Key word
- times as many
- a number of copies of an amount: 3 times as many as 4 is 3 × 4 = 12
Ready to use it?
- Divide a whole number by a unit fraction by multiplying.