Identify Numbers and Signs: Identify the numbers and their signs.We have two fractions, −125 and −(−39). The second fraction has a double negative, which will become positive.
Simplify Double Negative: Simplify the double negative. −(−39) becomes +39 because the rule of signs states that a negative times a negative is a positive.
Simplify Fraction 39: Simplify the fraction 39.39 divided by 3 equals 3. So, −(−39) simplifies to +3.
Combine Numbers: Combine the two numbers.Now we have −125+3. To add these, we need a common denominator. Since 3 is a whole number, we can write it as a fraction with a denominator of 12 to get the common denominator. 3 is the same as 1236.
Rewrite Whole Number: Rewrite the whole number as a fraction. 3 as a fraction with a denominator of 12 is 1236 because 3×12 equals 36.
Add Fractions: Add the two fractions.Now we add −125 and 1236. The common denominator is 12, so we add the numerators: −5+36.
Perform Addition: Perform the addition.−5+36=31. So, −125+1236=1231.
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