MDTP Fractions and Rational Numbers 2

Question 1

What is 2/3 - 1/4?

Accepted Answer

5/12

Answer

LCD of 3 and 4 is 12: 8/12 - 3/12 = 5/12.

Question 2

Which of the following is a rational number?

Accepted Answer

√9

Answer

√9 = 3, which is an integer and therefore rational; the others are irrational.

Question 3

Order from least to greatest: -1/2, -2/3, -1/4

Accepted Answer

-2/3, -1/2, -1/4

Answer

Converting to decimals: -1/2=-0.5, -2/3≈-0.667, -1/4=-0.25; ordered: -2/3, -1/2, -1/4.

Question 4

If you eat 3/8 of a pizza and your friend eats 1/4, what fraction remains?

Accepted Answer

3/8

Answer

Eaten = 3/8 + 2/8 = 5/8; remaining = 1 - 5/8 = 3/8.

Question 5

Simplify: (3/5) / (9/10)

Accepted Answer

2/3

Answer

3/5 ÷ 9/10 = 3/5 × 10/9 = 30/45 = 2/3.

MDTP - Mathematics Diagnostic Testing Project Practice Test