Question

which of the following is another way to express the problem 1 - (-7)?
-1 + 7
1 + (-7)
1 + 7
-1 + (-7)

Explanation:

Step1: Recall subtraction rule

Subtracting a negative is adding its positive: \(a - (-b) = a + b\).

Step2: Apply to \(1 - (-7)\)

Using the rule, \(1 - (-7) = 1 + 7\).

Answer:

1 + 7 (corresponding to the option "1 + 7")