If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

### Course: Early math review>Unit 1

Lesson 1: Counting

# Counting with small numbers

Sal counts squirrels and horses.

## Want to join the conversation?

• What is infinite in real life. Like is there anything we can point to in reality that we know is truely infinite?
• In the world of surreal numbers and games, there are many varieties of infinity that are all meaningfully different from each other! Omega (which I'll call w) is what we usually think of as infinity. Varieties of infinity include but are not limited to w, w/2, squareroot(w), w - 1, w + 1, 2w, w^2, etc.
• Aren't counting numbers also known as whole numbers? Why are there two different names for the same thing?
• Counting numbers are also known as natural numbers, and are a different set of numbers than whole numbers.

Counting, or natural, numbers are 1, 2, 3, 4, 5, 6, 7, 8, ... (i.e., no negatives or partials).

Whole numbers include all natural numbers, as well as the number 0.

Integers include all whole numbers, and their opposites (i.e., 0, 1 and -1, 2 and -2, 3 and -3, etc.)

There are more sets of numbers, and it can be helpful to think of them in a different context. For example, you might check out this video to see a helpful visual and comparison https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-numbers-operations/cc-8th-irrational-numbers/v/categorizing-numbers.
• I always find it diffcult to count ,what should I do?
• Keep practicing! And maybe get some help from a teacher or a parent! Good luck!😊
• Which method do you guys prefer when counting? Using your hand or picturing it on your mind?
• Picturing it in my mind. I find it more useful when I am taking the Linear Algebra course of Khan Academy.
• what does the word counting come from?
• it comes from Middle English (as a noun): from Old French counte (noun), counter (verb), from the verb computare ‘calculate’ (see compute).
• Hmm any suggestions on how i could improve this method of learning how to count? my friends son is learning how to count but not at a fast rate.
• Khan is a great place to practice skills, however if he is struggling with the exercise here try a more hands on method. grab 10 -20 of his favorite groups of toys( legos, cars, dinosaurs, something that is a high interest item for him.) Divide into two pile have the child count one and the parent count the other then let the child tell you who has more. Rise and Repeat :) A favorite small healthyish snack works well too ( cereal, goldfish, raisins.)
• Nine Horse in the box!,!,!
• Nine. 🐎💯
(1 vote)
• Why do we have to put four squirrels?