By accessing our **180 Days of Math for Third Grade Answers Key Day 81 **regularly, students can get better problem-solving skills.

## 180 Days of Math for Third Grade Answers Key Day 81

**Directions Solve each problem.**

Question 1.

212 – 83 =

Answer:

Explanation:

Working each column from right to left

3 is greater than 2 so you must regroup:

Take 1 from 1, so 1 becomes 0.

Add 10 to 2, so 2 becomes 12.

Question 2.

10 × 7 =

Answer:

70

Explanation:

10 times 7 is 70

The product of 10 and 7 is 70.

Question 3.

3 times 7 is _______

Answer:

21

Explanation:

3 times 7 is 21

7 + 7 + 7 = 21

Question 4.

45 ÷ 5 =

Answer:

Explanation:

45 ÷ 5 = 9

quotient is 9 and the remainder is 0

Question 5.

What fraction of the opossums is not shaded?

____________

Answer:

one-seventh

Explanation:

There are 7 opossums out of them 1 is not shaded

so, one-seventh of the fraction is not shaded.

Question 6.

30 6 = 24

Answer:

Explanation:

Question 7.

I ate lunch at 12:00 P.M. and a snack at 3:00 P.M. How long did I wait after lunch before having a snack?

_______________

Answer:

3 hours

Explanation:

The formula for calculating elapsed time is elapsed time = end time – start time. Subtract the minutes and hours separately

I ate lunch at 12:00 P.M. and a snack at 3:00 P.M.

12:00 P.M. to 3:00 P.M. is 3 hours

Question 8.

Which measurement is more likely to be the height of a door: 7 feet or 3 feet?

____________________

Answer:

7 feet

Explanation:

In general a person height is measured as 6 feet

the door should be more higher than the person.

so, the door height is 7 feet.

Question 9.

How many vertices does a cylinder have?

____________________

Answer:

no vertices

Explanation:

a cylinder have 2 edges and no vertices

Question 10.

List all the two-digit numbers that can be made using each of the digits 4, 5, and 6 once.

____________________

____________________

Answer:

45, 46, 44, 55, 66, 56, 65, 64, 54

Explanation:

3 x 3 = 9

we can make 9 combinations of 2 digit numbers with 3 numbers.