7th Grade - Chapter 5 Review

Evan is trying to save $60 to buy new parts for his bike.  He has saved 45% of what he needs so far.

How much has Evan saved so far?

Tags

CCSS.6.RP.A.3C

How much does Evan still need to save?  Write your answer as a dollar amount and as a percentage.

Tags

CCSS.6.RP.A.3C

Mr. Webb gave his waiter a $5.60 tip on a $40 bill. What percent tip did he give the waiter?

Erika is playing a game where the number of spaces she moves is determined by the spinner at right.  Each half of the spinner—left and right—is divided into equal regions as shown.

What is the probability that Erika will spin an even number on her next spin?

Tags

CCSS.7.SP.C.7B

If Erika spins a 4, she will land on a space that says, “Get an extra turn.”  If she then spins a 5, she gets 50 bonus points and will win the game.  What is the probability that she can spin a 4 and then a 5?

Melanie collects stickers.  Her favorite stickers have unicorns on them.  She has a sheet of stickers that has 2 unicorn stickers on it and 5 dragons.  She would like to increase her chances of getting a unicorn sticker when she selects one randomly.

One sheet of stickers:

Tags

CCSS.7.SP.C.7B

Melanie collects stickers.  Her favorite stickers have unicorns on them.  She has a sheet of stickers that has 2 unicorn stickers on it and 5 dragons.  She would like to increase her chances of getting a unicorn sticker when she selects one randomly.

Two sheets of stickers:

Tags

CCSS.3.NF.A.1

CCSS.3.NF.A.2B

If she takes two sheets of stickers like this and combines them, will she be more likely to select a unicorn sticker?  Why or why not?

Tags

CCSS.HSS.CP.B.7

Identify the following events as independent or dependent.

Reaching into a drawer in the dark, pulling out one sock, and then reaching back in and pulling out another. 

Tags

CCSS.HSS.CP.A.5

Identify the following events as independent or dependent.

Selecting a dog biscuit for your dog, feeding it to her, and then getting another one.

Tags

CCSS.HSS.CP.A.5