Numeric pyramid
You have to complete the numbers. Each number is the addition of the two numbers below it
Fill in the blank squares and click "Check" when you're finished.
Each square is the sum of the two squares below it.
Number pyramids are a simple exercise where you'll practice basic addition, one of the foundations of arithmetic.
This pastime is very suitable for beginners, as it doesn't involve complex operations and has a simple system for solving them.