## What is the sum of 4 and y 5?

The sum of 4 times y and 5 is 25.

**What is the sum of an expression?**

The “sum” is the answer to an addition of values. An expression is a maths sentence which conveys information. Note that no answer is given, so we cannot write and equation, only an expression stating that the two given values are being added together.

**How do you find the sum of XY?**

because the expression on the left means to sum up all the values of X and then square the sum (19² = 361), whereas the expression on the right means to square the numbers and then sum the squares (90.54, as shown). Some formulas involve the sum of cross products….

X | Y | XY |
---|---|---|

1 2 3 | 3 2 7 | 3 4 21 |

### What is a sum example?

The definition of a sum is a total amount you arrive at by adding up multiple things, or the total amount of something that exists, or the total amount of money you have. 4 is an example of the sum of 2+2. When you have $100, this is an example of the sum of money that you have.

**What is the sum of twice a number and 3?**

The sum (use plus symbol) of twice a number and 3 can be written as 2x+3. Answer: Let variable y be the unknown number. So triple a number means 3y. The difference (use minus symbol) of triple a number and 5 should be written as 3y – 5.

**Which is the sum of 2, 4 and 3?**

The result of adding two or more numbers. Example: 9 is the sum of 2, 4 and 3. (because 2 + 4 + 3 = 9). Drag the numerals to the two blue boxes to sum them:

## What do you mean by sum of squares?

Sum of squares refers to the sum of the squares of numbers. It is basically the addition of squared numbers. The squared terms could be 2 terms, 3 terms, or ‘n’ number of terms, first n even terms or odd terms, set of natural numbers or consecutive numbers, etc. This is basic math, used to perform the arithmetic operation of addition

**How to calculate the sum of n numbers?**

In arithmetic, we often come across the sum of n natural numbers. There are various formulae and techniques for the calculation of the sum of squares. Let us write some of the forms with respect to two numbers, three numbers and n numbers. x 2 + y 2 → Sum of two numbers x and y. x 2 +y 2 +z 2 → Sum of three numbers x, y and z.