# 180 Days of Math for Fourth Grade Day 77 Answers Key

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## 180 Days of Math for Fourth Grade Answers Key Day 77

Directions Solve each problem.

Question 1.
17 + 13 = ___ Explanation:
Ones Place Value
7 + 3 = 10
Put the 0 in Ones place
Carry the 1 to Tens place
Tens Place Value
1 + 1 + 1 = 3
Put the 3 in Tens place

Question 2.
Write 0.53 as a fraction.
______________
0.53 = $$\frac{53}{100}$$
Explanation:
To convert the decimal 0.53 to a fraction, just follow these steps:
Step 1: Write down the number as a fraction of one:
0.53 = $$\frac{0.53}{1}$$
Step 2: Multiply both top and bottom by 10 for every number after the decimal point:
As we have 2 numbers after the decimal point, we multiply both numerator and denominator by 100. So,
$$\frac{0.53}{1}$$ =  $$\frac{0.53 X 100}{1 X 100}$$ = $$\frac{53}{100}$$
Question 3.
45 ÷ 6 = ______
7
Explanation:
We have the equation:
45 ÷ 6 = 7
Calculated to 0 decimal places. Question 4. 6
Explanation:
We have the equation:
30 ÷ 5 = 6
Calculated to 0 decimal places. Question 5.
Round 457 to the nearest hundred.
______________
500
Explanation:
457-400 = 57
500 – 457 = 43
So nearest hundred is 500

Question 6. ÷ 5 = 9
Explanation:
Multiplication and division are inversely proportional
c ÷ 5 = 9
c = 9 X 5
c = 45
Question 7.
What is the date of the third Monday in August?
______________ 19th
Explanation: Question 8.
What is the length of a rectangle that has a width of 3 inches and an area of 12 in2?
length of rectangle is 4 inches
Explanation:
Area of rectangle is length X width
Area = length X width
12 = 3 X width
width = 12 ÷ 3
Width = 4inches

Question 9.
I have one curved surface, no edges, and no corners. What solid am I?
______________
Sphere have one curved surface, no edges, and no corners
Explanation:
A sphere has no edges and therefore no corners. It has one curved face that goes all the way around. Question 10.
If you subtract me from 732, you get 173. What number am I?