Careless Carleigh: Rational Number Operations (GL)

Instructions

For each problem, fictional student Carleigh made a mistake.  Explain what her mistake is, correct the problem, and give the real answer.  Be sure to make your corrections with a RED pen!

1

-15 - 14 = ___

1

-7 - (-15) = ___

1

-8 + (-12) = ___

1

11 + (-2) - (-6) = ___

1

2/3 + 9/4 = ___

1

3/8 ÷ 1/4 = ___

1

|-11| + |-20| = ___

1

Solve 3x2 - 9 when x = 4.

1

Show the math sentence -4 + 7 - 6 on a number line.

1

-8 - (-4) = ___

1

3/7 - 4/8 = ___

1

2/5 - 3/8 = ___

1

Write a math sentence for the integer chip model.

1

Write a math sentence for the integer chip model.

1

Create an integer chip model with an answer of -2.

1

-15 - 14 = ___

-7 - (-15) = ___

-8 + (-12) = ___

11 + (-2) - (-6) = ___

2/3 + 9/4 = ___

3/8 ÷ 1/4 = ___

|-11| + |-20| = ___

Solve 3x2 - 9 when x = 4.

Show the math sentence -4 + 7 - 6 on a number line.

-8 - (-4) = ___

3/7 - 4/8 = ___

2/5 - 3/8 = ___

Write a math sentence for the integer chip model.

Write a math sentence for the integer chip model.

Create an integer chip model with an answer of -2.

Create an integer chip model with an answer of 0.