How do you simplify #-14 - 21 #?

2 Answers
Apr 7, 2017

#-14 - 21 = -14 + (-21) = -35#

Apr 7, 2017

Answer:

#-35#

Explanation:

You can think about this in two ways:

  • Using directions on the number line:

A negative number means you are moving to the LEFT, going DOWN the number line.

#-14-21# can be read as as

"Go #14# to the left and then another #21# to the left"

Altogether this will be #35# to the LEFT, giving #-35#

  • Negative numbers can also be considered as debts:
    You have borrowed money which needs to be repaid.

Read this as "I borrowed $14 and then another $21"
Altogether I have borrowed $35.

You can write this as an ADDITION of two negative numbers:

#(-14) + (-21) = -35#