# 180 Days of Math for Fourth Grade Day 50 Answers Key

By accessing our 180 Days of Math for Fourth Grade Answers Key Day 50 regularly, students can get better problem-solving skills.

## 180 Days of Math for Fourth Grade Answers Key Day 50

Directions Solve each problem.

Question 1.  Explanation:
Subtract the values which are in one’s place
Put the 9 in one’s place and carry 18 to the carry row
The difference of 28 and 9 is 19.

Question 2.
9 × 6 = _____
9 x 6 = 54
Explanation:
The product of 9 and 6 is 54.
we have to multiply 9 with 6.

Question 3.
How many twos are in 18?
______________
18 ÷ 2 = 9
Explanation:
To know how many twos are in 18 we have to divide 18 by 2
There are 9 twos in 18.

Question 4.
List all the factors of 24.
______________
Factors of 24 are 1, 2, 3, 4, 6, 8, 12 and 24.
Explanation:
Factors are nothing but multiples of  24
The combination of factors gives the product as 24 are called factors
a number or algebraic expression that divides another number or expression evenly—i.e., with no remainder is called a factor.

Question 5.
What is the number after 3,899?
______________
3900
Explanation:
The 3,899 (three thousand eight hundred ninety-nine) is an odd four-digits composite number
following 3898 and preceding 3900.

Question 6.
24 ÷ = 4
24 ÷ 6 = 4
Explanation:
The division and multiplication are inversely proportional operations
6 x 4 = 24

Question 7.
How many mm are in 2 cm?
______________
2 cm = 20 mm
Explanation:
1 cm = 10 mm
2 x 10 = 20
1 centimeter is equal to 10 millimeters

Question 8.
____ quarts = $$\frac{1}{2}$$ gallon
2 quarts = $$\frac{1}{2}$$ gallon
Explanation:
1 gallon = 4 quarts
so, half of the gallon = 2 quarts.

Question 9.
Circle the right angles.  Explanation:
a right angle is an angle of exactly 90 degrees
Figure A and C shows 90 degrees

Question 10.
$$\frac{1}{5}$$ of 45 is 9, so $$\frac{4}{5}$$ of 45 is
_____________________
$$\frac{4}{5}$$ of 45 is 36
$$\frac{1}{5}$$ of 45 is 9,
$$\frac{4}{5}$$ of 45 is 36