Chapter 1 Test Review - 7th Grade

Chapter 1 Test Review

7th Grade

1) A copy machine produces 40 copies in 5 minutes. How many copies can the machine make in 30 minutes? (1 pt.) Explain how you found your answer or type your work. (1 pt.)

 $STEP\ 1:\ \frac{40\ copies}{5\ \min.}\ =\ \frac{?\ copies}{30\ \min.}$   $STEP\ 2:\frac{40}{5}\left(\frac{6}{6}\right)=\frac{240}{30}$   $STEP\ 3:\ 240\ copies\ in\ 30\ \min.$  

Multiple Choice

Would the following proportion be correct for the problem below?

(PROBLEM: A copy machine produces 20 copies in 4 minutes. How many copies can the machine make in 56 minutes?)

 $\ \frac{20\ copies}{56\ \min}=\ \frac{?\ copies}{4\ \min}$  

• Yes

• No

Complete the portion web for 4/5.

Include:

Decimal

Percentage

Words/Pictures

Open Ended

Type a correct way to WRITE 0.23 or 23/100.

Multiple Choice

Which is more likely?

• Landing on an odd number

• Landing on a number greater than 5

Multiple Select

Which of these are correct representations for the probability of landing on a 3 or 4?

SELECT ALL THAT APPLY.

• 3/4

• 2/8

• 25%

• 1/8

• 0.125

Solve the fraction subtraction problem:

 $\frac{5}{8}-\frac{1}{2}$  

STEP 1: Find a common denominator - 8
STEP 2: Rewrite 1/2  $\frac{1}{2}\left(\frac{4}{4}\right)=\frac{4}{8}$  
STEP 3: Subtract the numerators:  $\frac{5}{8}-\frac{4}{8}=\frac{1}{8}$  

Multiple Choice

Ms. Watkins wants to subtract two fractions. Her work is shown below. Is Ms. Watkins' work correct?

 $\frac{2}{6}-\frac{1}{3}=\frac{1}{3}$  

• Yes

• No

Open Ended

Amy reached into a bag, recorded the color of the tile she picked, returned the tile and drew again. These are the tiles she has drawn so far: red, red, blue, yellow, blue, red, green, red, blue, green. What is the probability of pulling out a red tile?

Amy reached into a bag, recorded the color of the tile she picked, returned the tile and drew again. These are the tiles she has drawn so far: red, red, blue, yellow, blue, red, green, red, blue, green. What is the probability of Amy NOT pulling a blue tile?

There are ten tiles and three of them are blue. Seven of the tiles are NOT blue, so P(NOT blue) = 7/10.

Because there are 2 green tiles, and 10 tiles total...

 $\frac{2\ green}{10\ pulls}=\frac{?\ green}{70\ pulls}$  

 $\frac{2}{10}\left(\frac{7}{7}\right)=\frac{14}{70}$  

Amy would pull 14 green tiles in 70 tries.

How to Write 3/5 as a fraction with a numerator of 18:

 $\frac{3}{5}\times\left(\frac{6}{6}\right)=\frac{18}{30}$ 

REMEMBER: The numerator is the TOP number of the fraction! 

Open Ended

Write 2/6 as a fraction with a numerator of 14.

How to calculate the area of this shape:

 Step 1: Find the two shapes.

Step 2: Find the area of the rectangle

 $A_2=\frac{base\ \times height}{2}$  

Step 3: Find the area of the triangle
 $A_2=\frac{base\ \times height}{2}$