# CBSE Class 7 Maths worksheet for chapter- Integers

Sep 30, 2022, 16:45 IST

‘Integer’ is derived from the Latin word whole or intact. Therefore, integers are whole numbers consisting of positive or negative numbers or zero, called a combination of negative and whole numbers. Integers can never be fractional or decimal numbers. Generally, a set of integers is represented by Z.

Eg, Z = { -7, -2, 0, 3, 9} ## Addition and Subtraction of Integers

Learning to add and subtract integers is very important to do simple math in everyday life to do a simple calculation. Like calculating the pocket money, you spend per day. Calculates the ratio between the among integers.

#### Multiplication of Integers

Multiplication is an easy thing for most of you. However, it is essential to pay attention to the number symbol when multiplying the numbers. This will be very helpful while simplifying the calculation.

#### Multiplication of a Positive and Negative Integer

Multiplication of positive and negative numbers will always leave the answer as a negative number.

#### Multiplication of Two Negative Integers

Multiplying two negative numbers will always lead to a positive number. It would help if you kept note of this article while simplifying the quadratic equation.

### Solved Examples

Q1. If x + (-62) = -121, then the value of x will be

1. -183
2. -59
3. 59
4. 183

Explanation: x + (-62) = -121 or x – 62 = -121

or  x = -121 + 62 = -59.

Q2. If 42 = -6a, then the value of a will be

1. –6
2. -7
3. -8
4. -9

Explanation: 42 = -6a

or -6a = 42

or a = 42/(-6)= -7.

Q3. The ascending order of 45, -29, 21, -45 and 23 is

1. -45, -29, 21, 23, 45
2. 21, 23, 45, –45, -29
3. 21, 23, -29, 45, -45
4. 45, 23, 21, -29, -45

Explanation: Ascending order means arranging the numbers from the smallest to the greatest.

Q4. The descending order of -5, -17, 10, -14 and 2 is

1. 10, 2, -5, -14, -17
2. -17, -14, -5, 2, 10
3. -5, -14, -17, 2, 10
4. 2, 10, -5, -14, -17

Explanation: Descending order means arranging the numbers from the greatest to the smallest.

Q5. On simplification of the arithmetic expression

(3 x 60) + (3 x 0), we get

1. 0
2. 80
3. 175
4. 180

Explanation: (3 x 60) + (3 x 0) = 180 + 0 = 180.

Q6. After simplification of the arithmetic expression

(2 x 20) + (2 x 4), we get

1. 5
2. 40
3. 48
4. 100