Answers Common Core Math 7 - MA3107 CRPercent Increase and Decrease

Solving Problems Involving Rational Numbers Answers

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The temperature falls from 0 degrees to degrees in hours. Which expression finds the change in temperature per hour?

Negative StartFraction 7 over 2 EndFraction divided by StartFraction 49 over 4 EndFraction

Negative StartFraction 7 over 2 EndFraction times StartFraction 49 over 4 EndFraction

Negative StartFraction 49 over 4 EndFraction times StartFraction 7 over 2 EndFraction

Negative StartFraction 49 over 4 EndFraction divided by StartFraction 7 over 2 EndFraction

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Which expression best estimates ?

7 divided by 2

6 divided by 1

8 divided by 3

3 divided by 2

Ankur estimated the quotient of to be 3. Which best describes his error?

Ankur multiplied the compatible numbers 15 and –3.

Ankur found that the quotient of a positive number and a negative number is negative.

Ankur found that the quotient of a positive number and a negative number is positive.

Ankur added the compatible numbers 15 and –3.

Which expression best estimates ?

18 divided by 3

Negative 18 divided by 3

Negative 18 divided by (negative 3)

18 divided by (negative 3)

Which is the best estimate of ?

Which expression is equivalent to ?

StartFraction 9 over 4 EndFraction divided by three-halves

Negative StartFraction 9 over 4 EndFraction divided by (negative two-thirds)

Negative StartFraction 9 over 4 EndFraction divided by two-thirds

StartFraction 9 over 4 EndFraction divided by (negative three-halves)

Which division expression is equivalent to ?

StartFraction 13 over 3 EndFraction divided by (Negative StartFraction 5 over 6 EndFraction)

Negative StartFraction 5 over 6 EndFraction divided by StartFraction 13 over 3 EndFraction

StartFraction 13 over 3 EndFraction divided by StartFraction 5 over 6 EndFraction

Negative StartFraction 13 over 3 EndFraction divided by (Negative StartFraction 5 over 6 EndFraction)

Which expression has a positive quotient?

Negative three-fourths divided by Negative two-thirds

Negative StartFraction 1 over 8 EndFraction divided by 3 and one-fifth

2 and StartFraction 2 over 7 EndFraction divided by negative one-fifth

Negative 6 divided by Five-thirds

Several batches of stew were made yesterday. Each batch required pounds of meat. All together, pounds of meat was used. Janice tried to find the number of batches of stew made. Her work is shown below.When she checked the answer by estimating, it did not make sense. What error did Janice make?