Multiple Choice
–1.8 – 3.9 =
(1 point)
Responses
–2.1
–2.1
5.7
5.7
2.1
2.1
–5.7
–5.7
–7 + 5 =
(1 point)
Responses
–2
–2
12
12
–12
–12
2
To calculate the sum of -1.8 and -3.9, you need to subtract 3.9 from -1.8.
The correct answer is -5.7.
To solve this multiple-choice problem -1.8 - 3.9, you need to subtract 3.9 from -1.8.
Step 1: Start by subtracting the absolute values:
|-1.8| - |-3.9|
Step 2: Determine the sign of the result based on the initial values. Since we are subtracting a positive number (3.9) from a negative number (-1.8), the result will also be negative.
Step 3: Perform the subtraction and apply the determined sign:
-1.8 - 3.9 = -5.7
So, the correct answer is -5.7.