Exam-style question
Try this first
Calculate 110101₂ + 010111₂ using binary addition. Show the carries and give the final answer.
Model answer
What a good answer should say
- 110101₂ + 010111₂ = 100110₂.
Explanation
Why this works
Starting at the right, 1 + 1 gives 0 with a carry of 1. The next column is 0 + 1 + 1 = 10₂, giving 0 with a carry.
Continuing from right to left produces the result 100110₂. As a check, 110101₂ is 53 and 010111₂ is 23, giving 76, which is 100110₂.
Common mistake
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