Grade 3 · Maths · Lessons
One part out of eight
🍕pizza➗equal parts1️⃣one part🔢bottom number
One part.The big ideaEqual parts only. The bottom number counts them all. One part is one over that number.
How it works
Equal parts only. The bottom number counts them all.
One part is one over that number: one third is 1/3.
Shade one part of the equal parts.
Example 1: One third
- Cut a circle into 3 equal parts.
- Shade one part.
- That is 1/3.
Example 2: One eighth
- Cut a bar into 8 equal parts.
- Shade one part.
- That is 1/8.
Example 3: Pick the bar
- Which bar has one eighth shaded?
- Count its equal parts: 8. Check one is shaded.
- Pick the bar with 8 equal parts and 1 shaded.
Words to know
- unit fraction
- A fraction with 1 on top.
- equal parts
- Parts that are the same size.
Watch out
- The parts must be equal.
- More parts means each part is smaller.
- One third is bigger than one eighth.
Try it
- A bar has 4 equal parts. What is one part called?
- Which is bigger, 1/3 or 1/8?
- What does the bottom number count?
- How do you write one sixth?
Answers: 1. one fourth (1/4) · 2. 1/3 · 3. the equal parts · 4. 1/6
For grown-upsCut a piece of paper into equal parts and name one part.