Evaluate the numerical expression. 1/2 − (−3/4)
To evaluate the expression 1/2 - (-3/4), we simplify it step by step:
First, let's simplify the subtraction of fractions:
1/2 - (-3/4) = 1/2 + 3/4
To add fractions, they need a common denominator. In this case, the common denominator is 4.
1/2 + 3/4 = 2/4 + 3/4
Now, we can add the fractions, keeping the common denominator:
2/4 + 3/4 = (2 + 3)/4 = 5/4
Therefore, the expression 1/2 - (-3/4) simplifies to 5/4.
Evaluate this expression.
75.5 − 32.55
To evaluate the expression 75.5 - 32.55, subtract 32.55 from 75.5:
75.5 - 32.55 = 42.95
Therefore, the expression 75.5 - 32.55 equals 42.95.
Evaluate this expression.
32 + (−72.1)
To evaluate the expression 32 + (-72.1), we perform the addition:
32 + (-72.1) = -40.1
Therefore, the expression 32 + (-72.1) equals -40.1.
The temperature in Antarctica at noon is 14°F. By 9:00PM, the temperature had dropped by 16.2 degrees. What was the temperature at 9:00PM?
To find the temperature at 9:00 PM, we need to subtract 16.2 degrees from the temperature at noon.
Temperature at 9:00 PM = Temperature at noon - Temperature drop
Temperature at 9:00 PM = 14°F - 16.2°F
Performing the subtraction:
Temperature at 9:00 PM = -2.2°F
Therefore, the temperature at 9:00 PM was -2.2°F.
Determine the value of the expression –5.45 + 4.12 –8.66.
To determine the value of the expression –5.45 + 4.12 –8.66, we perform the addition and subtraction:
–5.45 + 4.12 – 8.66 = -1.33 - 8.66
Now, subtracting:
-1.33 - 8.66 = -9.99
Therefore, the value of the expression –5.45 + 4.12 –8.66 is -9.99.
Simplify.
7.829 − 3.21