Answers Pre-Algebra - MA3119 A Distance LearningAdding Integers

Adding Integers — Unit test Answers

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A quality control manager is inspecting four digital scales to see if they accurately reflect a weight of 0 ounces. The table shows the weight displayed on four empty scales.Empty Scale Weight DisplaysScale 1–1 ounceScale 2–2 ouncesScale 30 ouncesScale 4–1 ounceWhat is the average error in the scale displays?

–4 ounces

–1 ounces

0 ounces

1 ounce

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Which expression is modeled by this arrangement of tiles?

40 divided by (negative 10)

40 divided by 10

40 divided by 40

40 divided by 40

Carmen drew this figure to represent the dividend of a division expression.What number is represented by the arrow?

–9

Veronica wants to check her work after evaluating . What steps can she follow to verify her answer?

Divide her answer by –6 and see if the result is –108.

Divide her answer by –108 and see if the result is –6.

Multiply her answer by –6 and see if the result is –108.

Multiply her answer by –108 and see if the result is –6.

The quotient of two numbers is negative. What must be true about the two numbers?

The dividend is negative.

The divisor is negative.

Either the dividend or the divisor is negative, but not both.

Both the divisor and the dividend are negative.

Jordan is using a number line to model the division expression . What should be a step in his work?

Draw a chain of bounces to the right, 12 units wide, starting at –24 and ending at 12.

Draw a chain of bounces to the left, 12 units wide, starting at 0 and ending at –24.

Draw a chain of bounces to the right, 12 units wide, starting at 0 and ending at 24.

Draw a chain of bounces to the left, 12 units wide, starting at 24 and ending at 0.

Which expression is modeled by this set of arrows on the number line?

Negative 6 divided by (negative 3)

Negative 6 divided by 3

6 divided by (negative 3)

6 divided by 3

Which situation is best modeled with a division expression?

the total cost of 4 pints of strawberries that sell for $3 each

the cost per pint of 3 pints of blueberries if the total cost was $6

the cost per pint of raspberries after applying a $1 coupon if the normal price was $3 each

the total cost of a pint of blackberries that sells for $3 and a pint of cherries that sells for $4

A football team has attempted 6 running plays. The change in field position resulting from each play is shown in the table.Running Play OutcomesPlay 1–3 yardsPlay 22 yardsPlay 3–1 yardPlay 4–2 yardsPlay 5–3 yardsPlay 61 yardWhat is the average change in field position per running play?

–6 yards per play

–1 yard per play

0 yards per play

1 yard per play

Alicia drove 265 miles in 5 hours. What is the average rate that she traveled?

49 miles per hour

51 miles per hour

53 miles per hour

55 miles per hour

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Adding Integers — Unit test Answers

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