Question

1. $12 + 7 + -13 + 18 = \underline{\quad\quad\quad}$

Explanation:

Step1: Sum positive numbers first

$12 + 7 + 18 = 37$

Step2: Add the negative number

$37 + (-13) = 37 - 13$

Step3: Calculate final subtraction

$37 - 13 = 24$

Answer:

24