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RS Aggarwal Solutions Class 7 Mathematics Solutions for Integers Exercise 1B in Chapter 1 - Integers

Question 33 Integers Exercise 1B

(-11) × (-15)+ (-11) ×(-25)

Answer:

Solution:-

Using the Distributive Law of Multiplication [(a×b) + (a×c) = a ×(b+c)]

Let,

a= -11, b= -15, c= -25

Then,

= (-11) × (-15) + (-11) ×(-25)

The above equation can be written as,

= (-11) × {(-15) + (-25)} … [∵(a×b) + (a×c) = a ×(b+c)]

= (-11) × {-15-25} … [∵ (+ × −= −)]

= (-11) × (-40) … [∵(− × −= +)]

= 440

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