When a student uses a number line to add 57 + 34, what strategy are they employing?

When a student uses a number line to add 57 + 34, what strategy are they employing?

• A. Hops of ten along the number line to get to an anchor number
• B. The standard algorithm to combine the ones and tens separately
• C. Adding the tens first and then using the ones to finalize the answer
• D. A counting strategy to jump to each tick mark on the number line

Answer: (C)

When a student uses a number line to add 57 + 34, they are employing a strategy that involves breaking the numbers down into tens and ones. In this particular case, by adding the tens first (30 from 34) to 57, the student might jump from 57 to 87 (57 + 30), and then add the ones (4 from 34) to 87, resulting in a final answer of 91. This method effectively uses the number line to represent the addition in a structured way, making it easier for students to visualize the process and see how the numbers are combined. This strategy reinforces the understanding of place value, enabling students to approach addition in a more manageable way without getting overwhelmed by larger numbers.

When a student uses a number line to add 57 + 34, they are employing a strategy that involves breaking the numbers down into tens and ones. In this particular case, by adding the tens first (30 from 34) to 57, the student might jump from 57 to 87 (57 + 30), and then add the ones (4 from 34) to 87, resulting in a final answer of 91. This method effectively uses the number line to represent the addition in a structured way, making it easier for students to visualize the process and see how the numbers are combined. This strategy reinforces the understanding of place value, enabling students to approach addition in a more manageable way without getting overwhelmed by larger numbers.