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Binary Stage 1: Creating a decimal number from a binary number CHALLENGE 01: 101 = 5 CHALLENGE 02: 110 = 6 CHALLENGE 03: 1101 = 13 CHALLENGE 04: 10101 = 21 CHALLENGE 05: 110101 = 53 Go to website for introduction lesson with printable class cards. Then use this activity for follow-up. Re-imaged from https://dth-stg-cms.esa.edu.au/teachers/lesson-ideas/introduction-to-binary