Question

David added 2 and –3 using the number line tool. Which of the following errors did he make?

Answer 1

The first and third one only

Explanation:

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Answer 2

When adding 2 and -3 the correct answer is -1.Mathematically it can be seen as: 2 + (-3) = 2 -3 = -1. You must always remember that different signs are subtracted and that equal signs are added when making algebraic sums.