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## Early math review

### Course: Early math review>Unit 1

Lesson 3: Counting objects

# Counting objects 1

Learn to count groups of whales, sheep, and flowers.

## Want to join the conversation?

• Who invented the counting system?
• The most commonly used system of numerals is the Hindu–Arabic numeral system. Two Indian mathematicians developed it. Aryabhata of Kusumapura developed the place-value notation in the 5th century and a century later Brahmagupta introduced the symbol for zero.
• can you help me on questions thank you
• If you type out your question here, people will be able to give you an answer.
• Can I use multiplication +addition to calculate the number
• Multiplication is also known as repeated addition.
Like this
8 x 8 = 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8
I hope it helps
• Can I first count the first row and then multyply next example there is 2 rows and total is 10 5 multyply 2 is =10 (not the best English)
• Yes, and this is an excellent way of counting large groups of things that are ordered in rows or columns. Later, you will use this process for multiplication and division as well.
• This is easy if you focus you can get the answer isin't it?
• Yes it is! Focusing is the main way to get good work done.
• I don't understand how people manage to get 1 billion energy points on Khan...
(1 vote)
• What does the infinity sign look like?
• Can you subtract to find the number of something?