By accessing our **180 Days of Math for Fifth Grade Answers Key Day 40 **regularly, students can get better problem-solving skills.

## 180 Days of Math for Fifth Grade Answers Key Day 40

**Directions Solve each problem.**

Question 1.

86 – 65 = ___

Answer: 21

Explanation:

By subtracting smaller number 65 from bigger number 86,

we get the difference as 21

Question 2.

10 × 40 = ______

Answer: 400

Explanation:

When we multiply the numbers 10 and 40,

we get the product = 400

Question 3.

How many groups of 5 are in 80?

_______________

Answer: 16

Question 4.

Is 978 greater than, less than, or equal to 987?

_______________

Answer:

978 is less than 987

Explanation:

When we compare the place values,

tens place in 978 is less than 987.

So, 978 is less than 987

Question 5.

write \(\frac{65}{100}\) as a decimal.

______________

Answer:

0.65

Explanation:

\(\frac{65}{100}\) as a decimal.

= 0.65

Question 6.

(60 ÷ 10) + 12 = ______

Answer: 18

Explanation:

The given equation is in combined operation,

by applying BODMAS rule

(60 ÷ 10) + 12

= 6 + 12

= 18

Question 7.

7 × 5 = 40 –

Answer: 5

Explanation:

7 × 5 = 40 –

Let eh unknown number be x

7 x 5 = 40 – x

35 = 40x

x = 40 – 35

x = 5

Question 8.

Is the area of a postage stamp measured in cm^{2} or m^{2}?

_______________

Answer:

Postage stamp is measured in cm^{2}

Explanation:

The area of a postage stamp measured in cm^{2}

As, its area is small.

Question 9.

Does a triangle have any parallel lines?

_____________________

Answer:

No, it does not have parallel lines.

Explanation:

Triangles have no parallel lines,

as it have only 3 sides and impossible to any side to be parallel.

Question 10.

If Ali reads 6 more books, how many books will she have read?

_____________________

Answer:

16 books

Explanation:

From the above given graph of books read this year,

At first he read 10 and later he read more 6.

So, total books read 10 + 6 = 16

Question 11.

If you roll a 6-sided die, what is the probability of getting a 5?

_____________________

Answer:

0.16 probability of getting 5

Explanation:

total number of event can occur is 6 and

if we role the die and getting 5 is one event

then the probability of getting a 5

\(\frac{1}{6}\) = 0.16

Question 12.

A birthday cake is cut into 24 pieces. There are 6 pieces left after the party. What percentage of the cake was eaten?

_______________________

Answer:

75%

Explanation:

A birthday cake is cut into 24 pieces.

There are 6 pieces left after the party.

Cake eaten in the party = 24 – 6 = 18

percentage of the cake was eaten = \(\frac{18}{24}\) x 100

= \(\frac{3×100}{4}\)

= 75