Add Whole Numbers: example 1.15

Find each sum:

Work it out on paper first. Then open the solution one step at a time, and stop as soon as you can finish on your own.

Solution

ⓐ The first addend is zero. The sum of any number and zero is the number. $0 + 11 = 11$

ⓑ The second addend is zero. The sum of any number and zero is the number. $42 + 0 = 42$

Your turn

The book's Try It right after this example: same idea, new numbers. Only the answer is given.

Find each sum:

How did it go?

ⓐ The first addend is zero. The sum of any number and zero is the number.	$0 + 11 = 11$
ⓑ The second addend is zero. The sum of any number and zero is the number.	$42 + 0 = 42$