17.9k views
2 votes
(-21)+(-13)+20=
(-21)+(-13)+20

User Lwconquer
by
8.4k points

1 Answer

6 votes

Final answer:

The sum of the expression (-21) + (-13) + 20 is -14. We add the two negative numbers together and then add the positive number, ensuring to keep the sign of the largest absolute value when the signs are different.

Step-by-step explanation:

To solve the given expression (-21)+(-13)+20, we have to follow the rules for adding and subtracting integers.

Firstly, let's look at the numbers with the same sign. We have -21 and -13, which are both negative. When we add two negative numbers, we add their absolute values together and keep the negative sign. So, -21 + (-13) becomes -21 + -13 = -34.

Now we have the sum of -34 and 20. Since these numbers have opposite signs, we subtract the smaller absolute value from the larger one and keep the sign of the larger absolute value. This translates to -34 + 20, which becomes -14.

The final solution to the expression (-21) + (-13) + 20 is -14.

User Alexismorin
by
8.2k points

No related questions found