Suppose we are asked to find the sum of two numbers, say 3 and 4. The sum of 3 and 4 is denoted by 3 + 4. Exactly in the same way, the sum of the literal x and a number 8 is denoted by x + 8 and is read ‘x plus 8’, which can also be read as ‘8 more than x,’ or ‘increase x by 8’.

Similarly, y more than a literal x is written as x + y. We can also read x + y as the sum of x and y.

(x + y) + z means that the sum of literals x and y is added to the literal z whereas x + ( y + z) means that the literal x is added to the sum of literals y and z.

Since literals are used to represent numbers. Therefore, addition of variables obeys all properties of addition of numbers. Here, we list the properties of addition of variables.

a + b = b + a

(a + b) + c = a + (b + c)

a + 0 = a = 0 + a, where 0 is known as additive identity

(i) The sum of y and 2.

(ii) 4 more than a number y.

(iii) x added to 8.

(iv) Increase x by 5

(v) The sum of x and 6 added to z

(vi) y added to the sum of z and 4

(vii) The sum of a and b

(viii) The sum of c and 4

(ix) r added to 7

(x) Increase p added 9

• Addition of Literals

• Subtraction of Literals

• Multiplication of Literals

• Division of Literals

• Constants and Variables

• Coefficient

BYJU'S

GMAT

GRE

1st Grade

2nd Grade

3rd Grade

4th Grade

5th Grade

6th Grade

7th grade math

8th grade math

9th grade math

10th grade math

11th grade math

12th grade math

Precalculus

Worksheets

Chapter wise Test

MCQ's

Math Dictionary

Graph Dictionary

Multiplicative tables

Math Teasers

NTSE

Chinese Numbers

CBSE Sample Papers