Subject: Mathematics
Book: Maths Mastery
Adding and subtracting negative numbers requires careful attention to signs. For addition: if both numbers share the same sign, add their absolute values and keep that sign. For example, (–3) + (–5) = –8. If signs differ, subtract the smaller absolute value from the larger and keep the sign of the larger absolute value: (–7) + 4 = –3. Subtraction can be converted to addition of the opposite: a – b = a + (–b). Understanding negative numbers is vital in contexts like temperature changes, financial debts, or coordinate geometry. Frequent practice cements your skill, preventing sign errors in more advanced algebraic operations.
What is the sum of all odd numbers from 1 to 99?
View QuestionA triangle has angles 60°, 60°, and 60°. What type of triangle is it?
View QuestionA man invests Rs. 5000 at 5% per annum simple interest. What is the total amount after 3 years?
View QuestionWhat is the square root of 121?
View QuestionIf x:y = 2:3 and z:y = 4:3, what is x:z?
View QuestionWhat is the greatest common divisor (GCD) of 36 and 48?
View QuestionIf a right triangle has legs of 9 cm and 12 cm, what is the length of the hypotenuse?
View QuestionWhat is the LCM of 15 and 20?
View QuestionA sum triples in 20 years at simple interest. What is the rate of interest per annum?
View QuestionThe sum of the reciprocals of two numbers is 1/4. If one number is 12, what is the other?
View Question