Grade 4 · Maths · Lessons
A fraction, that many times
➗fraction✖️times🦘jumps🔢tops
Fraction times whole.The big ideaA fraction times a whole number is that many jumps of the same size.
How it works
A fraction times a whole number is that many jumps of the same size.
4 × 1/5 is four jumps of one fifth, which is 4/5.
The top is the number of jumps. The bottom stays.
Example 1: Jumps of a fifth
- 4 × 1/5 = ?
- 4 jumps of 1/5.
- 4/5.
- So the answer is 4/5.
Example 2: Counting unit fractions
- 15/12 = ? × 1/12
- 15/12 is 15 jumps of 1/12.
- So it is 15 × 1/12.
- So the answer is 15.
Example 3: Simplify
- 6 × 1/8 = ?
- 6 jumps of 1/8 is 6/8.
- 6/8 is the same as 3/4.
- So the answer is 3/4.
Words to know
- unit fraction
- A fraction with 1 on top.
- jump
- One step of the same size.
Watch out
- Multiply the top, keep the bottom.
- A fraction can be more than 1.
- Simplify at the end.
Try it
- 16/10 = ? × 1/10
- Each bag weighs two tenths pound. Ava buys 2 bags. How many pounds?
- 8 × 1/10 = ?
Answers: 1. 16 · 2. 2/5 · 3. 4/5
For grown-upsSay 'three jumps of one quarter' and walk three quarter-steps along a ruler.