Lesson 6.4 · Measurement and Data
Counting and comparing groups
After you sort things into groups, you can count each group. Then you can tell which group has more and which has fewer.
Sort, count, compare
Follow three steps.
- Sort the things into groups.
- Count each group.
- Compare the numbers.
The bigger number has more
The group with the bigger number has more. The group with the smaller number has fewer. If the numbers match, the groups have the same number.
Worked example: Cats and dogs
🐱 🐶 🐱 🐱 🐶
Sort: cats 🐱 🐱 🐱 and dogs 🐶 🐶.
Count: 3 cats and 2 dogs.
Compare: 3 is more than 2. There are more cats.
Worked example: Red and blue
🔴 🔵 🔵 🔴 🔵 🔵
Red: 🔴 🔴. That is 2.
Blue: 🔵 🔵 🔵 🔵. That is 4.
4 is more than 2. There are more blue circles. There are fewer red circles.
Worked example: Three groups
🍎 🍌 🍎 🍇 🍌 🍎
Apples: 3. Bananas: 2. Grapes: 1.
3 is the biggest number, so apples have the most. 1 is the smallest, so grapes have the fewest.
Common mistake
Don't count one thing twice! Touch each thing once as you count, or cross it off.
Practice
How many stars are there?
⭐ 🌙 ⭐ ⭐ 🌙 ⭐
Type a number.
Are there more ducks or more frogs?
🦆 🐸 🦆 🦆 🦆 🐸
Which group has fewer?
🍪 🧁 🧁 🍪 🧁 🧁 🧁
Compare the cars and the buses.
🚗 🚌 🚗 🚌 🚗 🚌
How many green squares are there?
🟩 🟨 🟩 🟩 🟨 🟩 🟨 🟩
Type a number.
Which fruit has the most?
🍓 🍊 🍋 🍊 🍓 🍊 🍊
Kim sorts her buttons. She has 🔴 🔴 🔴 red buttons and 🔵 🔵 🔵 blue buttons. How many buttons does she have in all?
Type a number.