Math Number Sense and Operations 3

Question 1

What is 3/4 + 5/6?

Accepted Answer

19/12

Answer

Converting to a common denominator of 12: 3/4 = 9/12 and 5/6 = 10/12, so 9/12 + 10/12 = 19/12.

Question 2

What is 15% of 80?

Accepted Answer

12

Answer

15% of 80 = 0.15 × 80 = 12.

Question 3

The ratio of boys to girls in a class is 3:5. If there are 24 boys, how many girls are there?

Accepted Answer

40

Answer

Since 24 boys corresponds to 3 parts, one part = 8; 5 parts (girls) = 5 × 8 = 40.

Question 4

In the number 5,847,392, what is the place value of the digit 4?

Accepted Answer

Ten-thousands

Answer

Reading from right to left: ones, tens, hundreds, thousands, ten-thousands — the digit 4 sits in the ten-thousands place.

Question 5

Evaluate: −8 + 15 − 3

Accepted Answer

4

Answer

−8 + 15 = 7, then 7 − 3 = 4.

Math Practice Test