By accessing our **180 Days of Math for Fourth Grade Answers Key Day 31 **regularly, students can get better problem-solving skills.

## 180 Days of Math for Fourth Grade Answers Key Day 31

**Directions Solve each problem.**

Question 1.

Answer:

Explanation:

Perform addition operation on above two given numbers. Add 12 with 14 the sum is 26.

Question 2.

\(\frac{1}{4}\) of 36 is ___

Answer:

Perform multiplication operation. Multiply 1/4 with 36.

\(\frac{1}{4}\) x 36

= 1 x 9

=** 9**

So, \(\frac{1}{4}\) of 36 is 9.

Question 3.

Divide 20 by 5. ______________

Answer:

20 ÷ 5 =** 4**

Explanation:

Perform division operation on above two given numbers. Divide 20 by 5 the quotient is 4.

Question 4.

Answer:

Explanation:

Perform division operation on above given numbers. Divide 40 by 8 the quotient is 5.

Question 5.

Write the smallest 4-digit numeral using 0, 2, 8, and 7.

______________

Answer:

The given numbers are 0, 2, 8, and 7.

To get the smallest 4-digit numeral. We have to arrange the given numbers from smallest to largest.

The numbers from smallest to largest are 0, 2, 7, 8.

Here, the zero has no value when we place zero as first digit. So, place zero after 2.

The smallest 4-digit numeral using 0, 2, 8, and 7 is 2,078.

Question 6.

Fill in the missing number.

20, 40, 60, ____, 100

Answer:

The given series is 20, 40, 60, ____, 100.

The difference between first and second numbers is 20.

40 – 20 = **20**

The difference between second and third numbers is 20.

60 – 40 =** 20**

So, add 20 to the number 60 in the sequence number. The sum is **80**.

60 + 20 = **80**

The missing number in the given series is **80**.

The next number in the sequence is 20, 40, 60, **80**, 100.

Question 7.

Write the length in millimeters.

______________

Answer:

1 centimeter (cm) = 10 millimeter (mm)

Conversion from centimeters to millimeters:

2.5 cm x 10 mm = 25mm

The line length is **25 millimeters.**

Explanation:

In the above image we can observe a scale with units as centimeters. The black line is starting at 0 cm and ending at 2.5 cm. So the total line length is **2.5 centimeters. **To convert centimeters to millimeters we need to multiply 2.5 cm with 10 mm the product is equal to 25 millimeters. The line length is 25 mm.

Question 8.

If the temperature were 89 degrees Fahrenheit, would you wear a bathing suit or a jacket?

_____________________

Answer:

I wear **bathing suit,** if the temperature is 89 degrees Fahrenheit.

Question 9.

What type of prism is shown?

________________

Answer:

The type of prism as we can observe in the above image is **triangular prism**.

Question 10.

Complete the subtraction grid.

– | 44 | 48 | 53 | 61 | 72 | 75 |

19 | ||||||

29 | ||||||

39 |

Answer:

**Explanation:**

- After subtracting 19 from the first row of the grid, we get the result as below.

44-19=25; 48-19=29; 53-19=34; 61-19=42; 72-19=53; 75-19=56 - After subtracting 29 from the first row of the grid, we get the result as below.

44-29=15; 48-29=19; 53-29=24; 61-29=32; 72-29=43; 75-29=46 - After subtracting 39 from the first row of the grid, we get the result as below.

44-39=5; 48-39=9; 53-39=14; 61-39=22; 72-39=33; 75-39=36

Now, fill the grid with the obtained results.