Question

(01.02 HC)Andrew is showing his work in simplifying (−5.7 + 2.2) − 1.1.

Step 1: (2.2 − 5.7) − 1.1
Step 2: 2.2 − (5.7 + 1.1)
Step 3: 2.2 − (6.8)
Step 4: −4.6

Which statement is true?

In step 1, Andrew used the commutative property.
In step 2, Andrew used the distributive property.
In step 3, Andrew used the associative property.
In step 4, Andrew's answer is incorrect.

Answer 1

from the beginning: (−5.7 + 2.2) − 1.1

to Step 1: (2.2 − 5.7) − 1.1

he switched the order of addition (-5.7 + 2.2) to (2.2 + (-5.7)) or (2.2 - 5.7, simplified)

do you remember which property this is?

Answer 2

no oof

Answer 3

when you switch the order of addition (or multiplication) it's the commutative property

therefore, step 1 uses the commutative property, which is also your solution

Answer 4

thank you