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7th Math Unit 2 Day 12 - 11/16

Last updated over 1 year ago
19 questions
Objective and Summary:
SWBAT draw connections between integer sign rules in multipliation and division by manipulating equations
1

Reverse--Change the multiplication equation into a division equation (like in our notes).

-4\times8=-32
(When writing division you can copy and paste this symbol: ÷ or you can just use a slash /)
(Highlight the symbol, Ctrl+c is copy, then Ctrl+v is paste)

CFS:
#1: Accurately divides using sign rules
#2: Writes accurate division equation

1

Reverse, Part 2--Change the multiplication equation into a division equation (like in our notes).

-7\times(-12)=84
(When writing division you can copy and paste this symbol: ÷ or you can just use a slash /)
(Highlight the symbol, Ctrl+c is copy, then Ctrl+v is paste)

CFS:
#1: Accurately divides using sign rules
#2: Writes accurate division equation

SPRINT--Calculate the quotient (answer) of the following questions:
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

− 100÷100 =

1

− 90÷10 =

1

0÷(− 4) =

MEDIUM Problems
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
1

Climate--With world temperatures steadily increasing, glaciers (large blocks of ice) in the sea are starting to melt, which affects sea levels and causes problems for island nations.
One large glacier lost a total of 225 millimeters over 15 years.

Write a division equation to show the average change in the glacier's height each year.
(Copy and paste division here: ÷ )

CFS:
#1: Accurately divides using sign rules

1

Fractions are also division. Simplify the following fractions.

A. 8/-12

1

Fractions are also division. Simplify the following fractions.

b. -16/32

1

Fractions are also division. Simplify the following fractions.

c. -18/-4

1

Fractions are also division. Simplify the following fractions.

d. -(10/3)

2

Answer the divison question below.
-72\div(-8)=

CFS:
#1: Accurately divides using sign rules

2

In Heartwood's 7th grade math class, the teacher is grading some quizzes. Two students gave different answers:

Student A wrote: \frac{1}{-2}
Student B wrote: \frac{-1}{2}

The teacher's key says the correct answer is supposed to be -0.5.
Explain which student or students are correct and why.

"Student ____ is correct because..."
"The sign of the quotient is (positive / negative) because..."

CFS:
#1: Accurately divides using sign rules
#2: Explains using mathematical evidence

Nice job!

Get some extra practice on dividing integers on IXL. These are in the starred recommendations.

You can also work ahead on other above-grade level skills.