ITBS Math Concepts and Estimation 3

Question 1

Which of these decimals is the greatest?

Accepted Answer

0.54

Answer

0.45

Answer

0.405

Answer

0.504

Question 2

A bag contains 5 red marbles, 3 blue marbles, and 2 green marbles. What is the probability of picking a blue marble at random?

Accepted Answer

3/10

Answer

1/5

Answer

1/3

Answer

3/7

Question 3

Which number sentence shows the distributive property?

Accepted Answer

4 × (3 + 5) = (4 × 3) + (4 × 5)

Answer

4 + 3 = 3 + 4

Answer

4 × (3 × 5) = (4 × 3) × 5

Answer

4 + 0 = 4

Question 4

If x + 8 = 15, what is the value of x?

Accepted Answer

7

Answer

5

Answer

6

Answer

8

Question 5

A train travels 240 miles in 4 hours. What is its average speed?

Accepted Answer

60 mph

Answer

40 mph

Answer

50 mph

Answer

80 mph

Question 6

Which of the following is closest to 1,000?

Accepted Answer

10 × 100

Answer

9 × 9 × 9

Answer

10 × 10 × 9

Answer

9 × 110

Question 7

A bookshelf has 6 shelves, each holding 25 books. About how many books are on the shelf if it is 80% full?

Accepted Answer

120

Answer

100

Answer

110

Answer

130