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Mathematics, 06.10.2019 11:00 j015

Part d
three students evaluated three different expressions using the real number properties and the order of operations. answer each question based on the processes they used and their results.
student 1:
5 - 2(4 + 9) - 11
5 - 2(4) - 2(9) -11
5 - 8 - 18 -11
5 + (-8) + (-18) + (-11)
-3 + (-18) + (-11)
-21 + (-11)
-32
student 2:
-9 + (6 + 9) - 42
-9 + (9 + 6) - 42
(-9 + 9) + 6 - 42
0 + 6 - 42
0 + 6 - 16
0 + 6 + (-16)
6 + (-16)
-10
student 3:
-4(14) - 32 - 2 ∙ 0
-4(10 + 4) - 32 - 2 ∙ 0
-4(10) - 4(4) - 32 - 2 ∙ 0
-40 - 16 - 32 - 2 ∙ 0
-40 - 16 - 9 - 2 ∙ 0
-56 - 9 - 2 ∙ 0
-65 - 2 ∙ 0
-67 ∙ 0
0

questions: all questions are multiple answers

question 1: which of the students used the commutative property to simplify their expression? select all that are true.
student 1
student 2
student 3
none of the students

question 2: which of the students used the associative property to simplify their expression? select all that are true.
student 1
student 2
student 3
none of the students

question 3: which of the students used the distributive property to simplify their expression? select all that are true.
student 1
student 2
student 3
none of the students

question 4: which of the students used the identity property to simplify their expression? select all that are true.
student 1
student 2
student 3
none of the students

question 5: which of the students found the correct value of their expression? select all that are true.
student 1
student 2
student 3
none of the students

ansver
Answers: 1

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Part d
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