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creativ13 [48]
2 years ago
9

1. Which expression is equivalent to −2.1+(−5.9)+(−3.7) ?

Mathematics
2 answers:
In-s [12.5K]2 years ago
7 0

Answer:

1.  −2.1−(5.9+3.7)

2.  −20+(−40)+(−60)

3.  associative properties

4.  commutative properties

5.  -43

Step-by-step explanation:

larisa86 [58]2 years ago
5 0

Answer:

1. Option b) -2.1 - (5.9+3.7)

2.  Option b) -20 + (-40) + (-60)

3. Associative property

4. Commutative property

5. -43

Step-by-step explanation:

1. We are given the expression:

-2.1 + (-5.9) + (-3.7)

Now, if we take minus common from the last two terms, then, the expression would be of the form:

-2.1 - (5.9+3.7)

Hence, the given expression is equivalent to option b) -2.1 - (5.9+3.7)

2.  We are given the expression:

-40 + (-20) + (-60)

Now, if we rearrange the terms in the expression, then, the expression would be of the form:

-20 + (-40) + (-60)

Hence, the given expression is equivalent to option b) -20 + (-40) + (-60)

3. The property mentioned here is the associative property.

a+(b+c) = (a+b)+c

4. The property mentioned here is the commutative property.

a+b = b + a

5.

-35 + 7 + (-15)\\=7 - (35 + 15)\\= 7 - 50\\= -43

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