Based on the number line shown, Emma wants to explain to her partner how to find the answer to . Which method would BEST use the number line as a mathematical representation?
- Point to number 2, then count three spaces forward while saying 'three, four, five' and land on 5
- Point to numbers 2 and 3 on the number line and say 'two plus three equals five'
- Start at 2, make three jumps forward while counting 'one jump, two jumps, three jumps,' and show the landing at 5 (correct answer)
- Find number 5 on the number line and explain that this is the answer to
Explanation: Choice C best demonstrates using the number line as a tool for mathematical reasoning by showing the addition process through movement and counting jumps. This connects the abstract operation to concrete actions on the number line. Choice A counts the landing numbers rather than the jumps, which can lead to confusion. Choice B uses the number line only to point to numbers without showing the operation. Choice D shows only the result without demonstrating the addition process.