1) The mass of an object is 27.3 grams. Which mass is greater than 27.3 grams?

Transcription

1 Midterm Practice Quiz #3 1) The mass of an object is 27.3 grams. Which mass is greater than 27.3 grams? A grams B grams C grams D grams 2) Which part of the figure is shaded? A B C. 6.7 D ) Ben put $100 into savings and plans to withdraw $15 each month. The expression w can be used to find the dollars left in Ben s account after w withdrawals. How much will be left after 6 withdrawals? a. $90 b. $60 c. $20 d. $10 4) What is the name of the property that justifies the step taken in the equation shown? 2 x (9 x 10) = (2 x 9) x 10 a. Associative Property of Multiplication b. Commutative Property of Multiplication c. Identity Property of Multiplication d. Distributive Property

2 5) In a basketball game, a basket scores 2 points and a free throw scores 1 point. Which expression can represent the total number of points scored by x baskets and y free throws? a. 2x y b. 2x + y c. x + 2y d. 2(x + y) 6) The expression shown can be used to find the area of a U-shaped garden plot. What is the first step to evaluate the expression? (20 + 6) a. 5(5) b c d ) The table shows the three states with the highest populations in Which of the following is the best estimate of the difference between the populations of California and Texas? State Population California 35.9 million Texas 22.5 million New York 19.2 million a) 13 million b) 17 million c) 16 million d) 11 million 8) What is the difference of 30.9 and 7.124? a) b) c) d) ) Which of the following is equal to 2? a) x b) x ( ) 8 c) ( ) x d) [( ) x ( )] 8

3 10) A class of 23 students bought flowers for their teacher for $ If they divide the cost equally (each student pays the same amount), how much should each student pay? a) $5.13 b) $2.12 c) $1.95 d) $ ) Kimberly scored a total of points in four events for her gymnastic competition. If she scored the same amount on each event, how many points did she score on each? a) points b) points c) points d) points 12) What is ? a) 0.8 b) 0.7 c) 0.08 d) ) Evaluate each expression for 3, 5, and 7. Show your substitution. (6 points) Expression Evaluate for 3 Evaluate for 5 Evaluate for 7 2x 6 x + 2x 7 14) Ms. Moore was asked to write the decimal as a fraction or mixed number. She wrote 3,045. In a complete sentence, explain why her answer is not correct. Then, write 1,000 the correct answer.

4 15) Change the fractions to decimals and then put the decimals in order from least to greatest ,000 = 2 10 = = 16) Write the fraction 11 as a decimal. Use long division and show your work ) Write each number in exponential form (using an exponent). 1,000,000 = 5,000,000,000 = 100 = 6,000 = 18) A billionaire is writing a check for $13,294,390,490. How would he write this amount of money in word form on the check? Jack has 1 of this amount. How much money does he have? 10 What is the place of the underlined digit? What is the value of the underlined digit? 19) A group of 10 girls are buying tickets to go to a Taylor Swift concert. The cheapest seats are in the high section and are $108 each. The most expensive seats are floor seats and

5 cost $304 per ticket. X amount of girls are going to buy the cheaper tickets. Y amount of girls are going to buy the expensive tickets. Write an expression to show how much money the girls will spend if they buy the cheap tickets. Use the variable x. If 7 girls are buying cheap tickets, how much money will they spend? Write an expression to show how much money the girls will spend if they buy the expensive tickets. Use the variable y. If 3 girls buy expensive tickets, how much money will they spend? 20) Evaluate each expression. A. ( ) 5 x 7 8 b (9 x 2 + 3)

6 Midterm Practice Quiz #3 Answer Key 1) D 2) A 3) A 100 (15w) = 100 (15 x 6) = = $10 4) A 5) B 6) C 7) A 8) D 9) D 10) C 11) C 12) B 13) Expression Evaluate for 3 Evaluate for 5 Evaluate for 7 2x 6 2(3) Final Answer = 0 2(5) Final Answer = 4 2(7) Final Answer = 5 x + 2x (3) Final Answer = (5) Final Answer = (7) Final Answer = 14 14) Ms. Moore was asked to write the decimal as a fraction or mixed number. She wrote 3,045. In a complete sentence, explain why her answer is not correct. Then, write 1,000 the correct answer. Ms. Moore is not correct because in 3.045, 3 is a whole number and is a part of 40 the whole. The answer should be written as a mixed number = 3 15) 202 1,000 = ) = = 0.22 Least to greatest: 0.2; 0.202; 0.22 = = ,000

7 17) Write each number in exponential form (using an exponent). 1,000,000 = 1 x 10 6 or ,000,000,000 = 5 x = ,000 = 6 x ) A billionaire is writing a check for $13,294,390,490. How would he write this amount of money in word form on the check? Thirteen billion, two hundred ninety four million, three hundred ninety thousand, four hundred ninety dollars Jack has 1 of this amount. How much money does he have? $1,329,439, What is the place of the underlined digit? ten millions What is the value of the underlined digit? 90,000,000 or ninety million 19) A group of 10 girls are buying tickets to go to a Taylor Swift concert. The cheapest seats are in the high section and are $108 each. The most expensive seats are floor seats and cost $304 per ticket. X amount of girls are going to buy the cheaper tickets. Y amount of girls are going to buy the expensive tickets. Write an expression to show how much money the girls will spend if they buy the cheap tickets. Use the variable x. 108x If 7 girls are buying cheap tickets, how much money will they spend? 108x = 108(7) = $756 Write an expression to show how much money the girls will spend if they buy the expensive tickets. Use the variable y. 304y If 3 girls buy expensive tickets, how much money will they spend? 304y = 304(3) = $912

8 20) Evaluate each expression. a. ( ) 5 x 7 8 (16 + 4) 5 x x x Final answer = 20 b (9 x 2 + 3) (18 + 3) Final Answer = 30