Answer:
Let's evaluate each of the expressions:
a.
17
−
(
−
1
)
17−(−1)
To subtract a negative number, you can think of it as adding the positive of that number. So,
17
−
(
−
1
)
17−(−1) is equivalent to
17
+
1
17+1, which equals 18.
b.
−
18
−
2
−18−2
When you subtract a positive number from a negative number, you can think of it as adding a negative number. So,
−
18
−
2
−18−2 is equivalent to
−
18
+
(
−
2
)
−18+(−2), which equals -20.
c.
14
−
(
−
6
+
(
−
1
)
)
14−(−6+(−1))
First, simplify the expression inside the parentheses:
−
6
+
(
−
1
)
−6+(−1) is equivalent to
−
7
−7.
Now, you have
14
−
(
−
7
)
14−(−7), which is the same as
14
+
7
14+7, and that equals 21.
So, the evaluations are:
a.
17
−
(
−
1
)
=
18
17−(−1)=18
b.
−
18
−
2
=
−
20
−18−2=−20
c.
14
−
(
−
6
+
(
−
1
)
)
=
21
14−(−6+(−1))=21