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Please answer 2 and below photo is above and show workthank you

Please answer 2 and below photo is above and show workthank you-example-1
User Roms
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2 Answers

3 votes

Answer:

18.6

Explanation:

Adding -20.4 to 39 is the same as subtracting 20.4 from 39. 39 - 20.4 = 18.6.

User Piera
by
8.8k points
4 votes

Answer:

See each problem number below for answers.

Explanation:

To solve this problem, we must remember the rules of addition and subtraction. If we are adding a negative, this is the same thing as subtracting a positive number (because subtraction is defined as the addition of a negative number). In addition, if we are subtracting a negative number, the two negative signs cancel each other out, and we are left with addition of a positive number. Let's use these rules in the problems you have given.

1) 2 - (-73)

Since the subtraction of a negative is the same as addition, we can rewrite this as:

2 + 73

which is a simple computation and leaves us with:

75

2) 39 + (-20.4)

The addition of a negative is the same as subtraction, so we can rewrite this as:

39 - 20.4

which is a simple computation and yields:

18.6

3) 67.086 - (-20)

The subtraction of a negative is the same as addition (similar to problem 1)

67.086 + 20 = 87.086

4) 60 + (-19)

The addition of a negative is the same as subtraction (similar to problem 2)

60 - 19 = 41

5) 87 - 64.05

This is a simple subtraction problem, the computation gives us the answer of:

87 - 64.05 = 22.95

Hope this helps!

User Andrew Song
by
8.1k points

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