By accessing our **180 Days of Math for Fourth Grade Answers Key Day 42 **regularly, students can get better problem-solving skills.

## 180 Days of Math for Fourth Grade Answers Key Day 42

Directions Solve each problem.

Question 1.

Answer:

Explanation:

Perform subtraction operation on above two given numbers. Subtract 25 from 46 the difference is 21.

Question 2.

Color \(\frac{3}{10}\).

Answer:

= 3/10 x 100

= 3 x 10

= **30**

So, **30 boxes** are shaded.

Explanation:

Total number of boxes are 100. We have to shade 3/10 of the boxes. Multiply 3/10 with 100 the product is 30. So, 30 boxes are shaded.

Question 3.

Answer:

Explanation:

Perform division operation on above two given numbers. Divide 18 by 9 the quotient is 2.

Question 4.

List all the factors of 12.

_____________

Answer:

Factors of 12 are **1, 2, 4, 8, 16**.

Explanation:

The numbers which divides 12 exactly leaving a remainder zero are the factors of 12. So, the factors of 12 are 1, 2, 4, 8, 16.

Question 5.

Write the ordinal number after sixteenth.

_____________

Answer:

The ordinal number is used to represent the position. The ordinal number after sixteenth is seventeenth or **17th**.

Question 6.

7 Ã— = 21

Answer:

7 Ã— Â = 21

Explanation:

To get the product 21 we need to perform multiplication operation. Multiply 7 with 3 the product is 21. The missing multiplicand is 3.

Question 7.

Calculate the perimeter of a square with 5 cm sides.

_____________________

Answer:

Given side = 5 cm

Perimeter of a square = 4 x side

= 4 x 5 cm

= 20 cm

The perimeter of a square with 5 cm sides is equal to** 20 cm.**

Question 8.

____ inches = \(\frac{1}{2}\) foot

Answer:

We know that 1 foot is equal to 12 inches.

Divide above equation by 2 on both sides.

1/2 foot = 12/2 inches

1/2 foot = **6 inches**

Question 9.

True or false? Plane shapes are 3-dimensional.

Answer:

**False**, Plane shapes are not 3-dimensional.

Question 10.

Jack is 87 cm tall. Joe is 13 cm taller. How tall is Joe?

_____________

Answer:

Jack is 87 cm tall.

Joe is 13 cm taller.

Add 87 cm with 13 cm the sum is equal to 100 cm.

87 cm+ 13 cm = 100 cm

Joe is **100 cm** tall.