Identify like terms: We start by looking at the expression and identifying like terms. In this case, we have -9 and -13 which are both negative, and we have 2 and 13 which are both positive.Combine negative and positive numbers: Now, let's combine the negative numbers together and the positive numbers together. We have -9 and -13, which add up to -22. We also have 2 and 13, which add up to 15. Calculation: -9 + (-13) = -22 and 2 + 13 = 15Add negative and positive sums: Next, we add the sum of the negative numbers to the sum of the positive numbers. We have -22 and 15. When we add a negative number to a positive number, we actually subtract the absolute value of the negative number from the positive number. Calculation: 15 - 22 = -7Check for errors: Finally, we check our work to ensure there are no math errors. We combined like terms correctly and performed the subtraction correctly.

Grade 7

Add three or more integers

Full solution

Q. Evaluate

-9-13+2+13

Identify like terms: We start by looking at the expression and identifying like terms. In this case, we have $-9$ and $-13$ which are both negative, and we have $2$ and $13$ which are both positive.
Combine negative and positive numbers: Now, let's combine the negative numbers together and the positive numbers together. We have $-9$ and $-13$ , which add up to $-22$ . We also have $2$ and $13$ , which add up to $15$ . $\newline$ Calculation: $-9 + (-13) = -22$ and $2 + 13 = 15$
Add negative and positive sums: Next, we add the sum of the negative numbers to the sum of the positive numbers. We have $-22$ and $15$ . When we add a negative number to a positive number, we actually subtract the absolute value of the negative number from the positive number. $\newline$ Calculation: $15 - 22 = -7$
Check for errors: Finally, we check our work to ensure there are no math errors. We combined like terms correctly and performed the subtraction correctly.