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You learn how to write numbers in different bases and how to change them into base ten. This matters because it builds number sense and helps you handle place value, counting patterns and base conversions in exams.
You should already be comfortable with place value, multiplication and division, and basic addition. You also need to know powers of small numbers such as 2, 5 and 10.
One question from this skill's own question bank, shown with its full working.
Convert 101₂ (base two) to base ten.
Working: 101₂ = 1×4 + 0×2 + 1×1 = 5.
This topic usually appears in SHS 1 or early SHS 2 as part of number work before more advanced algebra. It supports the kind of conversion and base arithmetic that may be tested in WASSCE-style questions.
Curriculum notes are a general guide to where this work normally sits. Always check the syllabus your school or examination body is currently using.
Other SHS Core: Number, Indices & Logarithms skills in Maths, at the same point in the course.
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6 questions with a worked answer after every attempt, and a SmartScore that tracks how close you are to mastery.