Question

there are number lines with marked points (-10,20,40), (-10,30,50), (-18,54) and a shovel icon.

Explanation:

Step1: Analyze the number line changes

First, observe the initial and final positions. Let's consider the operations on the number line. For example, from the first to the second number line, some values change. But maybe we are looking at a specific operation, like addition or subtraction. Let's take the green ruler at the bottom: we have -18 and 54. Wait, maybe we need to find the sum or difference? Wait, maybe the problem is to find the result of an operation, like (-18) + 72? Wait, no, let's check the numbers. Wait, 54 - (-18) = 54 + 18 = 72? Wait, no, maybe the problem is to find the total or a specific value. Wait, maybe the question is to find the sum of -18 and 54? Let's calculate that.

Step2: Calculate the sum

To find the sum of -18 and 54, we use the rule of adding integers: $-18 + 54 = 54 - 18 = 36$? Wait, no, 54 - 18 is 36? Wait, 18 + 36 = 54, yes. Wait, but maybe the problem is different. Wait, looking at the number lines, maybe the operation is related to moving on the number line. Alternatively, maybe the question is to find the result of 54 - (-18). Let's compute that: $54 - (-18) = 54 + 18 = 72$. Wait, maybe that's the case. Let's verify. If we have a number -18 and we add 72, we get 54. So $-18 + 72 = 54$. So the calculation is $54 - (-18) = 72$.

Answer:

72