NCERT Exemplar · Class 7 · Maths

Chapter 1: Integers

Practice each question, then open the answer or worked solution.

Questions

83 questions

Q81Written answer

Going 500 m towards east first and then 200 m back is same as going 200 m towards west first and then going 500 m back.

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Worked solution

True

Considering the originating point to the zero of a number line

In the first scenario: 500 – 200 = 300 m to the right from the starting point (0)

In the second scenario: -200 + 500 = 300 m to the right from the starting point (0)

Q82Written answer

(– 5) × (33) = 5 × (– 33)

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Worked solution

True

(– 5) × (33) = -165 and 5 × (– 33) = -165

Q83Written answer

(– 19) × (– 11) = 19 × 11

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Worked solution

True

As the product of numbers with same signs are equal to the absolute value

(– 19) × (– 11) = 19 × 11 = 209

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