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

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

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

+ 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?