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CHAPTER AT A GLANCE
Power Play
•Unit: Number System
•Board weightage: Exponents and powers give regular 1-mark, 2-mark and 3-mark questions on the laws of exponents, negative exponents and scientific notation (please check the latest sample paper)
•Key ideas from the textbook: exponential notation, laws of exponents, zero and negative exponents, expanded form with powers of 10, scientific (standard) form, counting by multiplication
•Most scoring part: simplifying expressions with the laws of exponents and writing numbers in scientific form
•Time to revise: about 60 minutes
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