Rational Numbers Quiz

• 0.25

• 0.5

• 0.75

• 1.25

Answer explanation

To convert \( \frac{3}{4} \) to a decimal, perform long division: 3 divided by 4. 4 goes into 3 zero times, so we add a decimal point and a zero, making it 30. 4 goes into 30 seven times (28), leaving a remainder of 2. Bring down another 0, making it 20. 4 goes into 20 five times (20), leaving no remainder. Thus, \( \frac{3}{4} = 0.75 \). The correct answer is 0.75.

Tags

CCSS.7.NS.A.2D

• 0.625

• 0.75

• 0.8

• 0.85

Answer explanation

To convert \( \frac{5}{8} \) to a decimal, divide 5 by 8 using long division. 8 goes into 5 zero times, then into 50 six times (48), leaving a remainder of 2. Bring down a 0 to get 20; 8 goes into 20 two times (16), leaving 4. Bring down another 0 to get 40; 8 goes into 40 five times (40), leaving 0. Thus, \( \frac{5}{8} = 0.625 \).

Tags

CCSS.7.NS.A.2D

• 0.777...

• 0.888...

• 0.999...

• 0.666...

Answer explanation

To convert \( \frac{7}{9} \) to a decimal, perform long division. Dividing 7 by 9 gives 0.777..., which repeats. Thus, the correct answer is 0.777...

Tags

CCSS.7.NS.A.2D

• 0.25

• 0.333...

• 0.5

• 0.75

Answer explanation

To convert \( \frac{1}{3} \) to a decimal using long division, divide 1 by 3. The result is 0.333..., which is a repeating decimal. Thus, the correct answer is 0.333... .

Tags

CCSS.7.NS.A.2D

• 0.2

• 0.4

• 0.5

• 0.6

Answer explanation

To convert \( \frac{2}{5} \) to a decimal, divide 2 by 5 using long division. 5 goes into 2 zero times, so we add a decimal point and a zero, making it 20. 5 goes into 20 four times, giving us 0.4. Thus, the correct answer is 0.4.

Tags

CCSS.7.NS.A.2D

The table below shows Claude's assets and liabilities. What is the total value of his assets?

• $24,950

• $25,420

• -$24,950

• $50,370

Answer explanation

To find the total value of Claude's assets, we sum the values listed in the assets section of the table. The correct total is $24,950, which matches the first answer choice.

Tags

CCSS.7.NS.A.3

• Karen owes $600 on her bed.

• Karen owes $1000 on her bed.

• Karen owes $200 on her bed.

• Karen owes $800 on her bed.

Answer explanation

Karen's bed costs $1,000. After a down payment of $200, she owes the remaining balance of $1,000 - $200 = $800. Therefore, the correct answer is that Karen owes $800 on her bed.

Tags

CCSS.7.NS.A.3

• -$8.25

• -$8.75

• -$9.25

• -$28.50

Answer explanation

Lola owes $18.50 and pays $9.75. To find her remaining debt, subtract: 18.50 - 9.75 = 8.75. Since she still owes this amount, her money is represented as -$8.75.

Tags

CCSS.7.NS.A.3

The amount of ibuprofen (medicine for headaches) breaks down by 30% each hour. If a person took a 200 milligram ibuprofen, how much will be left after 3 hours?

• 5.4 mg

• 68.6 mg

• 0.0054 mg

• 2,400,000 mg

Answer explanation

After 3 hours, the ibuprofen breaks down by 30% each hour. Starting with 200 mg, after 1 hour: 200 - 60 = 140 mg; after 2 hours: 140 - 42 = 98 mg; after 3 hours: 98 - 29.4 = 68.6 mg. Thus, 68.6 mg remains.

Tags

CCSS.7.NS.A.3

Answer explanation

Devon ate \(\frac{1}{4}\), friend 1 ate \(\frac{3}{8}\), and friend 2 ate \(\frac{1}{8}\). Total eaten = \(\frac{1}{4} + \frac{3}{8} + \frac{1}{8} = \frac{2}{8} + \frac{3}{8} + \frac{1}{8} = \frac{6}{8} = \frac{3}{4}\). Pizza left = 1 - \(\frac{3}{4} = \frac{1}{4}\). Thus, the correct answer is \(\frac{1}{4}\).

Tags

CCSS.7.NS.A.3