Question

Find the sum or difference:

a. -2.63 + 31
b. -1.88 - 42
c. -(-1.07) - 0
d. -5 - 0.356
a) a. 28.37, b. -43.88, c. 1.07, d. -5.356
b) a. 28.37, b. -40.88, c. 1.07, d. -5.356
c) a. 28.37, b. -41.88, c. -1.07, d. 5.356
d) a. -28.37, b. -43.88, c. -1.07, d. 5.356

Answer 1

The correct answers for the arithmetic problems are: a) 28.37, b) -43.88, c) 1.07, d) -5.356. We calculate each operation by applying basic arithmetic rules, considering the signs of the numbers involved to find the sums and differences.

Step-by-step explanation:

The student has asked for help with finding the sum or difference of four separate arithmetic problems. Let's evaluate each one step-by-step.

1. -2.63 + 31: Starting with a negative number and adding a positive number. The actual operation is akin to subtracting 2.63 from 31, which gives 31 - 2.63 = 28.37.
2. -1.88 - 42: Here we have a negative number and we are subtracting a larger positive number. This will yield a more negative result: -1.88 - 42 = -43.88.
3. -(-1.07) - 0: Negative of a negative number becomes positive, and subtracting zero doesn’t change the value, so -(-1.07) - 0 = 1.07.
4. -5 - 0.356: Subtracting a smaller number from a larger negative number results in a more negative number, -5 - 0.356 = -5.356.

Therefore, the correct answer is option (b): a) 28.37, b) -43.88, c) 1.07, d) -5.356.