STAAR Grade 5: Math 3

Question 1

What is the least common multiple (LCM) of 4 and 6?

Accepted Answer

12

Answer

The multiples of 4 are 4, 8, 12, 16... and multiples of 6 are 6, 12, 18... The smallest common multiple is 12.

Question 2

A triangle has angles measuring 45° and 75°. What is the measure of the third angle?

Accepted Answer

60°

Answer

The sum of angles in a triangle is 180°; 180 − 45 − 75 = 60°.

Question 3

Which of the following is the correct order from least to greatest?

Accepted Answer

1/4, 0.28, 0.3

Answer

1/4 = 0.25, so the order is 0.25 < 0.28 < 0.30, which is 1/4, 0.28, 0.3.

Question 4

What is 3/8 + 1/4?

Accepted Answer

5/8

Answer

Convert 1/4 to 2/8, then add: 3/8 + 2/8 = 5/8.

Question 5

A store sells apples for $0.75 each. How much would 8 apples cost?

Accepted Answer

$6.00

Answer

8 × $0.75 = $6.00.

STAAR Practice Test