7th Math Spring Interim Reteach Day 1

Objective and Summary:
SWBAT use the different rules of signs to evaluate expressions and equations involving positive and negative integers

1

MULTIPLE--Mariah is trying to find as many ways as possible to get a final answer of -24.
Select all expressions that are equivalent to -24.

CFS:
#1: Accurately interprets positive and negative signs

1

3x4=

1

3x(-4)=

1

-4x3=

1

-2x(-2)=

1

8x(-2)=

1

-8x(-2)=

1

9x(-9)=

1

-9x9=

1

-9x(-9)=

1

Exercise--A marathon runner lost 7 pounds per month for four months. What was the total change to her weight?
Write a multiplication equation to represent the situation.

CFS:
#1: Identifies appropriate signs from context of the problem
#2: Accurately represents equation and its product

1

Journey--Sometimes Mr. Espinoza takes the Cal Train up to San Francisco. Every time he rides the Cal Train, he has to pay a $4 fare. If he goes up to the city a total of 13 times, represent the change in his money with a multiplication equation.

CFS:
#1: Identifies appropriate signs from context of the problem
#2: Accurately represents equation and its product

1

Oops!--Mr. Kovalik removed three 4-point penalties from Danna’s math test because they were graded incorrectly. What is the change to Danna’s point total? Write a multiplication equation.

CFS:
#1: Identifies appropriate signs from context of the problem
#2: Accurately represents equation and its product

1

+ or =??--Use our rules for signs to determine if the product is positive or negative.

3(-10)
-2\cdot20
-10(-9)
9\times(-7)
100\cdot80
-1.5(2)
-2.75(-4.5)

Positive product
Negative product

1

72\div(-6)

CFS:
#1: Accurately divides using sign rules

1

-99\div(-9)

CFS:
#1: Accurately divides using sign rules

1

\frac{-60}{-5}

CFS:
#1: Accurately divides using sign rules

1

64÷(− 8) =

1

72÷(− 9) =

1

-99÷(− 9) =

1

SORT IT--Drag and drop the expressions on the left depending on whether they have a positive or negative answer.

-15\div3
-22\div(-11)
64\div(-8)
-12.25\div(-5.0008)
100\div100

Positive Quotient
Negative Quotient

2

Which fractions have the same value as − 1⁄4 ?

1

7th Math Spring Interim Reteach Day 1

MULTIPLE--Mariah is trying to find as many ways as possible to get a final answer of -24.Select all expressions that are equivalent to -24. CFS:#1: Accurately interprets positive and negative signs

3x4=

3x(-4)=

-4x3=

-2x(-2)=

8x(-2)=

-8x(-2)=

9x(-9)=

-9x9=

-9x(-9)=

Exercise--A marathon runner lost 7 pounds per month for four months. What was the total change to her weight? Write a multiplication equation to represent the situation.CFS:#1: Identifies appropriate signs from context of the problem#2: Accurately represents equation and its product

+ or =??--Use our rules for signs to determine if the product is positive or negative.

72\div(-6)CFS:#1: Accurately divides using sign rules

-99\div(-9)CFS:#1: Accurately divides using sign rules

\frac{-60}{-5}CFS:#1: Accurately divides using sign rules

64÷(− 8) =

72÷(− 9) =

-99÷(− 9) =

SORT IT--Drag and drop the expressions on the left depending on whether they have a positive or negative answer.

Which fractions have the same value as − 1⁄4 ?

If a is a positive number and b is a negative number, which of the following is true?

MULTIPLE--Mariah is trying to find as many ways as possible to get a final answer of -24.Select all expressions that are equivalent to -24. CFS:#1: Accurately interprets positive and negative signs

3x4=

3x(-4)=

-4x3=

-2x(-2)=

8x(-2)=

-8x(-2)=

9x(-9)=

-9x9=

-9x(-9)=

Exercise--A marathon runner lost 7 pounds per month for four months. What was the total change to her weight? Write a multiplication equation to represent the situation.CFS:#1: Identifies appropriate signs from context of the problem#2: Accurately represents equation and its product

+ or =??--Use our rules for signs to determine if the product is positive or negative.

72\div(-6)CFS:#1: Accurately divides using sign rules

-99\div(-9)CFS:#1: Accurately divides using sign rules

\frac{-60}{-5}CFS:#1: Accurately divides using sign rules

64÷(− 8) =

72÷(− 9) =

-99÷(− 9) =

SORT IT--Drag and drop the expressions on the left depending on whether they have a positive or negative answer.

Which fractions have the same value as − 1⁄4 ?

If a is a positive number and b is a negative number, which of the following is true?

MULTIPLE--Mariah is trying to find as many ways as possible to get a final answer of -24.
Select all expressions that are equivalent to -24.

CFS:
#1: Accurately interprets positive and negative signs

Exercise--A marathon runner lost 7 pounds per month for four months. What was the total change to her weight?
Write a multiplication equation to represent the situation.

CFS:
#1: Identifies appropriate signs from context of the problem
#2: Accurately represents equation and its product

72\div(-6)

CFS:
#1: Accurately divides using sign rules

-99\div(-9)

CFS:
#1: Accurately divides using sign rules

\frac{-60}{-5}

CFS:
#1: Accurately divides using sign rules

MULTIPLE--Mariah is trying to find as many ways as possible to get a final answer of -24.
Select all expressions that are equivalent to -24.

CFS:
#1: Accurately interprets positive and negative signs

Exercise--A marathon runner lost 7 pounds per month for four months. What was the total change to her weight?
Write a multiplication equation to represent the situation.

CFS:
#1: Identifies appropriate signs from context of the problem
#2: Accurately represents equation and its product

72\div(-6)

CFS:
#1: Accurately divides using sign rules

-99\div(-9)

CFS:
#1: Accurately divides using sign rules

\frac{-60}{-5}

CFS:
#1: Accurately divides using sign rules