Final answer:
The value of the expression -7 + 3.43 - 8.2 is calculated by performing the additions and subtractions in order, leading to a final answer of -11.77.
Step-by-step explanation:
To find the value of the expression -7 + 3.43 - 8.2, you need to follow the order of operations, which in this case is simply the addition and subtraction from left to right since there are no brackets or exponents to consider.
First, add -7 and 3.43:
Next, subtract 8.2 from the result:
Therefore, the value of the expression is -11.77.