Question

Tom painted 3/5 of his bedroom on Monday and 1/10 of his bedroom on Tuesday. How much does he have left to finish?

2/15


4/15


3/10


7/10

Answer 1

Answer: Tom has 3/10 of his room left to finish painting. The third choice is correct.

Explanation: Let’s write this as an equation.

Let x be the fraction of room that Tom has left to finish.

(3/5 + 1/10) + x = 1

Rewrite 3/5 as 6/10 so that it has a common denominator with 1/10.

(6/10 + 1/10) + x = 1

Combine like terms.

7/10 + x = 1

Subtract 7/10 from both sides.

x = 3/10

Therefore, since we know x = 3/10, we know that Tom has 3/10 of his room left to finish painting. The third choice is correct.

Answer 2

3/10

Explanation:

3/5 + 1/10

3/5 = 6/10

6/10 + 1/10 = 7/10 = total bedroom space he painted

10/10 - 7/10 = 3/10 = how much space is left

Answer = 3/10