[(-10) × (+9)] + (-10) is equal to
a. 100
b. -100
c. - 80
d. 80

Solution:

To solve the above expression we will use the basic properties of integers associated with the addition, subtraction and multiplication. Here we will also be using the order of operations rules to simplify the expression.

Let us follow the given steps:

Expression: [(-10) × (9)] + (-10)

Step 1: According to the BODMAS rule we will solve the brackets first.

[-10 × 9] - 10

Using the sign rule of integers, (-) × (-) = +

-90 - 10 = - 100

Therefore, [(-10) × (9)] + (-10) is equal to -100.

✦ Try This: [(-10) × (-8)] + (- 9) is equal to

[(-10) × (-8)] + (-9)

We will use the rule of integers, (-) × (-) = +

[80 - 9] = 71

Therefore, [(-10) × (-8)] + (-9) is equal to 71.

☛ Also Check: NCERT Solutions for Class 7 Maths Chapter 1

NCERT Exemplar Class 7 Maths Chapter 1 Solved Ex 2

[(-10) × (+9)] + (-10) is equal to: 100, -100, - 80, 80

Summary:

If we solve the given expression using the properties of integers then the expression [(-10) × (9)] + (-10) is equal to -100

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