ITBS Math Concepts and Estimation 3

Question 1

Which of these decimals is the greatest?

Accepted Answer

0.54

Answer

Comparing tenths digits: 0.54 has 5 in the tenths and 4 in the hundredths, making it larger than 0.504 (5 tenths, 0 hundredths, 4 thousandths).

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

There are 3 blue marbles out of 10 total (5+3+2=10), so the probability is 3/10.

Question 3

Which number sentence shows the distributive property?

Accepted Answer

4 × (3 + 5) = (4 × 3) + (4 × 5)

Answer

The distributive property states that a × (b + c) = (a × b) + (a × c), which matches 4 × (3 + 5) = (4 × 3) + (4 × 5).

Question 4

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

Accepted Answer

7

Answer

Subtracting 8 from both sides: x = 15 − 8 = 7.

Question 5

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

Accepted Answer

60 mph

Answer

Speed = distance ÷ time = 240 ÷ 4 = 60 mph.

ITBS - Iowa Test of Basic Skills Exam Practice Test