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

Directions Solve each problem.

Question 1.

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

Question 2.
Color $$\frac{3}{10}$$.

= 3/10 x 100
= 3 x 10
= 30
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.

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

Question 6.
7 Ã— = 21
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.
_____________________

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
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.
False, Plane shapes are not 3-dimensional.

Question 10.
Jack is 87 cm tall. Joe is 13 cm taller. How tall is Joe?
_____________