Answer:
35+18 =53
Explanation:
35 being the sum of two numbers where 18 is one of the numbers and we are looking for the unknown number. Anytime the problem has less in it, you add the two numbers that you are given to come up with the unknown number. so you would add 35 into 18 and get the sum of 53 and that is your unknown number, 53 minus 18 equals 35.