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CHAPTER AT A GLANCE
Operations with Integers
•Unit: Number System
•Board weightage: Multiplication and division of integers, sign rules, properties (commutative, associative, distributive) and word problems with gains and losses give regular 1-mark, 2-mark, 3-mark and 4-mark questions (please check the latest sample paper)
•Key ideas from the textbook: multiplication as repeated addition of tokens, pattern method, product of two negative integers, 1 × a = a, (−1) × a = −a, commutativity, associativity, division as the inverse of multiplication, Brahmagupta's rules of fortune and debt
•Most scoring part: writing the sign first, then multiplying the magnitudes, and checking by the inverse operation
•Time to revise: about 60 minutes
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