# 180 Days of Math for Fourth Grade Day 84 Answers Key

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## 180 Days of Math for Fourth Grade Answers Key Day 84

Directions Solve each problem.

Question 1.  Explanation:
Step by Step::
1. Working each column from right to left
2. 9 is greater than 6 so you must regroup: Take 1 from 3, so 3 becomes 2. Add 10 to 6, so 6 becomes 16.
3. 16 minus 9 is 7
4. 2 minus 1 is 1
36- 19= 17

Question 2.
Which is greater:
$$\frac{3}{10}$$ or $$\frac{3}{100}$$ ?
______________
$$\frac{3}{10}$$  is greater
Explanation:
make denominator equal for $$\frac{3}{10}$$ and $$\frac{3}{100}$$
$$\frac{3}{100}$$ = $$\frac{3}{100}$$
$$\frac{3}{10}$$ = $$\frac{3}{10}$$ X $$\frac{10}{10}$$ =  $$\frac{30}{100}$$
If the denominators are the same, then the fraction with the greater numerator is the greater fraction.
Now compare $$\frac{30}{100}$$  and $$\frac{3}{100}$$. Then
$$\frac{30}{100}$$ > $$\frac{3}{100}$$. Since $$\frac{30}{100}$$ has greater numerator.
So $$\frac{3}{10}$$ is greater.

Question 3.

24 ÷ 7 = ___
3
24 divided by 7 equals
3 with a remainder of 3
Explanation:
= 3 R 3
24 divided by 7 equals
3 with a remainder of 3 Question 4. 5
57 divided by 10 equals
5 with a remainder of 7
Explanation: Question 5.
What is 100 more than 1,706?
_____________________
1,806
Explanation:
1706 + 100 = 1806 Question 6.
25 ÷ = 5
5
Explanation:
Multiplication and division are inversely proportional.
So 25 ÷ c = 5
c = 25 ÷ 5
c= 5 Question 7.
Would you use kilograms or grams to measure the mass of a slice of cheese?
______________
Grams
Explanation:
The mass of the slice of cheese is light weight. So basic unit of weight measures in grams. So we have to use grams to measure the mass of cheese

Question 8.
How many days are in December?
______________
Answer: There are 31 days in December.
Explanation: Question 9.
How many angles are in a triangle?
______________
There are 3 angles in triangle.
Explanation: Question 10.
Complete the chart by rounding 2,176 to the specified places.

 Ten Hundred Thousand