Question

compute.
18.8 + (-7.5) =
7.9 - 49.35 =

Explanation:

Step1: Simplify the first addition

Adding a negative is subtraction:
$18.8 + (-7.5) = 18.8 - 7.5$

Step2: Calculate first result

Subtract the decimals:
$18.8 - 7.5 = 11.3$

Step3: Align decimals for subtraction

Rewrite to match decimal places:
$7.9 - 49.35 = 7.90 - 49.35$

Step4: Calculate second result

Subtract the smaller from larger, add negative sign:
$7.90 - 49.35 = -(49.35 - 7.90) = -41.45$

Answer:

$18.8 + (-7.5) = 11.3$
$7.9 - 49.35 = -41.45$