By accessing our **180 Days of Math for Fifth Grade Answers Key Day 51 **regularly, students can get better problem-solving skills.

## 180 Days of Math for Fifth Grade Answers Key Day 51

**Directions Solve each problem.**

Question 1.

Answer: 39

Explanation:

When we add two or more addends we get the sum.

19 + 20 = 39

Question 2.

8 × 9 = ___

Answer: 72

Explanation:

Multiply the numbers 8 and 9 to get the product.

8 x 9 = 72

Question 3.

Answer: 7

Explanation:

Question 4.

How many digits are in 12458?

______________

Answer:

Six (6)

Explanation:

Count he numbers to know the number of digits in 12458.

So, there are six digits.

Question 5.

\(\frac{1}{3}\) of 15 is ___.

Answer: 5

Explanation:

\(\frac{1}{3}\) of 15

= \(\frac{15}{3}\)

= 5

Question 6.

Write the number that comes next in the sequence.

30, 36, 42, ______

Answer: 48

Explanation:

The given sequence follows the n + 6 rule.

‘n’ is the given numbers.

42 + 6 = 28

Question 7.

15 + 30 = 50 –

Answer: 5

Explanation:

Let the given number be x

15 + 30 = 50 – x

45 = 50 – x

x = 50 – 45

x = 5

Question 8.

How many millimeters are in 5 centimeters?

_____________________

Answer:

50mm

Explanation:

1 cm = 10 mm

5 cm = 5 x 10 = 50 mm

Question 9.

True or false? A sphere has only curved surfaces.

_____________________

Answer:

True

Explanation:

A sphere has only one curved surface area, which is also the total surface area.

Question 10.

Write the coordinates of:

Answer:

(F, 5)

Explanation:

(F, 5)

first lets check the letters

letter = F

then check the number given

number = 5

now check the fourth intersection upwards from F

Question 11.

If you roll a 6-sided die, what is the probability of getting a 1 or a 2?

_____________________

Answer:

33% chance of getting 1 or 2 numbers

Explanation:

roll a 6-sided die

the probability of getting a 1 or a 2

1 or 2

2 positive events out of 6 events

= \(\frac{2}{6}\)

= \(\frac{1}{3}\)

=0.33

33% chance of getting 1 or 2 numbers

Question 12.

Find and color three rectangles within the image below.

Answer:

Explanation:

Answer may vary,

the above picture shows the possibility of rectangles.