Let's solve each of these math problems step by step and explain the reasoning behind each solution.
---
Question 1: What is 6050.287 rounded to the nearest ten?
Step-by-step:
- To round to the nearest
ten, look at the
ones digit (the digit in the ones place).
- The number is
6050.287.
- The
tens digit is
5 (in 6050), and the
ones digit is
0.
- Since the ones digit is
0 (less than 5), we
do not round up.
- So, 6050.287 rounded to the nearest ten is
6050.
✔ Answer: A) 6050
---
Question 2: The total land area for the United States is 3,537,438 square miles. What is this value rounded to the nearest thousand square miles?
Step-by-step:
- We are rounding to the nearest
thousand, so look at the
hundreds digit.
- Number:
3,537,438
- The
thousands digit is
7 (in 537,438 → 537 thousands)
- The
hundreds digit is
4 (from 438)
- Since 4 < 5, we
do not round up.
- So, 3,537,438 rounded to the nearest thousand is
3,537,000
✔ Answer: B) 3,537,000
---
Question 3: What is 40% of 250?
Step-by-step:
- 40% means
40 per 100, or
0.40 in decimal form.
- Multiply:
$$
0.40 \times 250 = 100
$$
✔ Answer: B) 100
---
Question 4: What is $\frac{3}{8}$ written as a percent?
Step-by-step:
- Divide numerator by denominator:
$$
\frac{3}{8} = 0.375
$$
- Convert to percent:
$$
0.375 \times 100 = 37.5\%
$$
✔ Answer: C) 37.5%
---
Question 5: What is the decimal 0.7 written as a fraction?
Step-by-step:
- 0.7 means
7 tenths →
$$
\frac{7}{10}
$$
- This fraction is already in simplest form.
✔ Answer: D) $\frac{7}{10}$
---
Question 6: A company donated 200 books. If 70 are fiction, what percent are fiction?
Step-by-step:
- Use the formula:
$$
\text{Percent} = \left( \frac{\text{Part}}{\text{Whole}} \right) \times 100
$$
- Plug in:
$$
\frac{70}{200} \times 100 = 0.35 \times 100 = 35\%
$$
✔ Answer: A) 35%
---
Question 7: In a parking lot, 1 out of every 8 cars is blue. What percent of the cars are blue?
Step-by-step:
- Fraction of blue cars:
$$
\frac{1}{8}
$$
- Convert to decimal:
$$
\frac{1}{8} = 0.125
$$
- Convert to percent:
$$
0.125 \times 100 = 12.5\%
$$
✔ Answer: D) 12.5%
---
✔ Final Answers:
1.
A) 6050
2.
B) 3,537,000
3.
B) 100
4.
C) 37.5%
5.
D) $\frac{7}{10}$
6.
A) 35%
7.
D) 12.5%
Let me know if you'd like explanations in simpler terms or visual aids!
Parent Tip: Review the logic above to help your child master the concept of math test worksheet.