Venn Park
Two circles help you count without counting anyone twice.
1 What is a Venn diagram?
Each circle is a group. Kids who ride a bike stand in the left circle. Kids who ride a scooter stand in the right circle.
Some kids ride both. They stand in the middle, where the two circles cross.
🚲 Bike
🛴 Scooter
bike
only
only
both
scooter
only
only
So a Venn diagram with two circles has three parts. Every kid goes in exactly one part.
2 Let's solve one together
At the park, 15 kids rode a bike. 11 kids rode a scooter. 6 of them rode both. How many kids were riding at the park?
🚲 Bike 15
🛴 Scooter 11
Watch out! 15 + 11 = 26 is too many. The 6 kids in the middle are inside the bike circle and the scooter circle, so they got counted two times. Take them away once: 26 − 6 = 20.
3 Your turn
Fill the middle first. Then each side. Then add all three.