Chapter 1 · ICSE Class 7 Mathematics

Integers

Master operations with positive and negative whole numbers — addition, subtraction, multiplication, and division.

🔢 Chapter 1

A number line showing integers from negative 5 to positive 5 A number line with integers from -5 to 5 marked, with 0 at the centre separating negative numbers on the left from positive numbers on the right -5 -4 -3 -2 -1 0 1 2 3 4 5 Negative Positive
1.1

Adding and Subtracting Integers

When adding integers with the same sign, add their values and keep the sign. When adding integers with different signs, subtract the smaller value from the larger and take the sign of the larger.

1

Find: (−8) + (−5)

−13 (same sign, add and keep the sign)

2

Find: (−12) + 7

−5 (different signs, subtract and take the sign of the larger)

1.2

Multiplying and Dividing Integers

When multiplying or dividing two integers with the same sign, the answer is positive. When the signs are different, the answer is negative.

1

Find: (−6) × (−4)

24 (same sign, positive answer)

2

Find: (−36) ÷ 9

−4 (different signs, negative answer)

Practice

Exercises

1. Find: (−15) + (−9)

2. Find: 18 + (−25)

3. Find: (−7) × 8

4. Find: (−9) × (−9)

5. Find: (−48) ÷ (−6)

Next chapter — Chapter 2: Rational Numbers ➗ →