Question

Eric started at sea level. He descended 13.7 meters and then ascended 15.2 meters. Write an addition expression in the form Descent + Ascent to represent this situation. Then calculate the sum and explain what it represents.
(A) (
) +
15.2


(B) The sum of
represents Eric’s location compared to
Choose...
.

Answer 1

The sum means that Eric is 3.3 m above sea level.

What is an addition expression?

This is a way of taking the sum of two or more expressions.

Given the following parameters

• The distance while descending = -13.7 meters
• The distance while ascending = +15.2 meters

An additional expression in the form of Descent + Ascent to represent this situation will be -13.7 + 15+ 2

Calculate the sum:

Sum =  -13.7 + 15+ 2Sum = 3.3 meters

Hence the sum means that Eric is 3.3 m above sea level.

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