💡 Phép cộng cơ bản — Fun Facts

Add every number from 1 to 10 and you get exactly 55.

1 + 2 + 3 all the way to 10 makes 55. Big kids learn quick ways to add up long lists of numbers like this!

Doubles are a magic trick — 5 plus 5 always makes 10!

When you add two numbers that are the same, it is called a double. Learning doubles like 5 + 5 helps you add super fast.

Adding 1 to a number gives you the very next counting number.

If you have 6 and add 1 more, you land on 7. That is why counting up is really just adding one each time.

You can add numbers in any order and get the same answer.

It does not matter which number goes first. 2 + 3 makes 5, and 3 + 2 also makes 5. Try it with your fingers!

When you add zero to a number, the number stays the same.

Adding zero is like adding nothing at all. So 5 + 0 is still just 5. Zero is a very gentle number!

The plus sign (+) tells you to put numbers together.

Whenever you see a little +, it means 'add these'. So 2 + 3 means put 2 and 3 together to make 5.

Adding means putting groups together to make a bigger number.

When you push two piles of blocks together and count them all, you are adding! Adding always makes the amount grow.