Adding three numbers is a good way to learn to be smart becauseWorking memoryBecause it uses this function.
In this quiz, we'll take things a step further.
The goal is to memorize the number of columns, rows, and diagonals where the answer to the addition (called the sum) matches the specified number, and then find the sum of the other columns. First, look at the example below to learn the rules.
The number of 9 squares
Vertical,next,DiagonalTherefore,
Count the columns that sum to a certain number.
★ Remember the set number,
Let's add up one after another
Now, let's try the next problem while keeping track of the time!
![[Question] Count the columns whose sum is 5. Count the columns whose sum is 6.](https://active.kidsfuture-investment.org/wp-content/uploads/2025/11/3251eccb2f90ac2c9db8befb4510bd1c.png)
Adding three numbers is a good way to learn to be smart becauseWorking memoryBecause it uses this function.
In this quiz, we'll take things a step further.
The goal is to memorize the number of columns, rows, and diagonals where the answer to the addition (called the sum) matches the specified number, and then find the sum of the other columns. First, look at the example below to learn the rules.
The number of 9 squares
Vertical,next,DiagonalTherefore,
Count the columns that sum to a certain number.
★ Remember the set number,
Let's add up one after another
Now, let's try the next problem while keeping track of the time!
![[Question] Count the columns whose sum is 5. Count the columns whose sum is 6.](https://active.kidsfuture-investment.org/wp-content/uploads/2025/11/894ad4436061338ed7e91e9b5c81f75b.png)
