Question

topic: adding real numbers
progress:
the movement of the progress bar may be uneven because questions can be worth more or less (including zer
evaluate the expression $(-3.8) + 2 + y$ for the given values of $y$.
y value value of expression
-2 -3.8
1.8
0
3.8

Explanation:

Step1: Substitute \( y = 1.8 \) into the expression

We have the expression \( (-3.8)+2 + y \). Substitute \( y = 1.8 \):
\( (-3.8)+2 + 1.8 \)
First, add \( -3.8 \) and \( 2 \): \( -3.8 + 2=-1.8 \)
Then add \( 1.8 \) to \( -1.8 \): \( -1.8 + 1.8 = 0 \)

Step2: Substitute \( y = 0 \) into the expression

Substitute \( y = 0 \) into \( (-3.8)+2 + y \):
\( (-3.8)+2 + 0 \)
Add \( -3.8 \) and \( 2 \): \( -3.8 + 2=-1.8 \)
Then add \( 0 \): \( -1.8+0 = -1.8 \)

Step3: Substitute \( y = 3.8 \) into the expression

Substitute \( y = 3.8 \) into \( (-3.8)+2 + y \):
\( (-3.8)+2 + 3.8 \)
First, add \( -3.8 \) and \( 3.8 \): \( -3.8 + 3.8 = 0 \)
Then add \( 2 \) to \( 0 \): \( 0 + 2=2 \)

Answer:

For \( y = 1.8 \), the value is \( 0 \); for \( y = 0 \), the value is \( -1.8 \); for \( y = 3.8 \), the value is \( 2 \).

Filling the table:

y value	value of expression
1.8	0
0	-1.8
3.8	2