Question

complete the equation for this model.
-25 -20 -15 -10 -5 0 5 10 15 20 25
□ - □ = □

Explanation:

Step1: Identify the start and change

The arrow starts at -20 and moves 25 units to the right (since from -20 to 5, the distance is 5 - (-20) = 25). In subtraction terms, starting value minus (negative of the change) or directly, the movement from -20 to 5 can be represented as -20 - (-25) = 5? Wait, no. Wait, the number line: starting point is -20, then moving to 5. The difference is 5 - (-20) = 25, but the equation is a - b = c. So if we start at -20, and we are doing a subtraction, maybe the first number is -20, and we subtract a negative? Wait, no. Wait, the arrow is from -20 to 5. So the change is +25 (since 5 - (-20) = 25). But the equation is a - b = c. So let's think: a - b = c. So if we have -20 - (-25) = 5? Wait, -20 - (-25) = -20 +25 =5. Yes. So the start is -20, we subtract -25? Wait, no, subtracting a negative is adding. So the equation would be -20 - (-25) = 5? Wait, let's check the number of units. From -20 to 5, how many steps? Each tick is 5? Wait, no, the ticks are at -25, -20, -15, -10, -5, 0, 5, etc. So from -20 to 5, the distance is 25 (since 5 - (-20) =25). So the equation is -20 - (-25) =5? Wait, no, maybe the first number is -20, and we are doing -20 +25 =5, but the equation is subtraction. So -20 - (-25) =5. Let's verify: -20 - (-25) = -20 +25 =5. Yes. So the blanks are -20, -25, and 5? Wait, no, wait: the first box is a, second is b, third is c. So a - b = c. So if a is -20, b is -25, then -20 - (-25) =5. Yes. So that works.

Step2: Fill in the blanks

So the first number is -20, the second is -25, and the result is 5. So the equation is -20 - (-25) = 5.

Answer:

-20 - (-25) = 5 (So the blanks are -20, -25, 5)