MCAS 2000, 8th Grade Math, Questions 9 to 12

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Question #9 (Short-Answer Question)

Compute:

43.68 X 2.5 =

Write the rule for the table shown below.

What does y equal in the equation below?

6 - 2y = -8

Erin is writing a science fiction story. She has invented a money system for her planet that uses four coins that she drew and named like this:

She has challenged her classmates to determine the relationships among the values of the coins from the following clues.

a. Use Clue 1 above to find how many s equal 1 . Use words or pictures to explain your reasoning.

b. Use Clue 2 to find how many s equal 1 . Use words or pictures to explain your reasoning.

c. Use Clue 3 and your answers to parts a and b to find how many s equal 1 . Use words or pictures to explain your reasoning.

d. Erin told her classmates that 1 is worth 25 cents in U.S. money. What is the value in U.S. money of each of the following?