# Number System Formative Assessment 2 - 4th Hour

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TBlanton
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Quizzes Created: 1 | Total Attempts: 197
Questions: 10 | Attempts: 197  Settings  This formative assessment checks your understanding of the real number system, fraction/decimal conversions, ratios, exponents, and scientific notation.

• 1.

### _____ .6

• A.

<

• B.

>

• C.

=

B. >
Explanation
The answer is ">" because it represents the greater than symbol. In mathematical notation, ">" is used to compare two numbers and determine if the left number is greater than the right number.

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• 2.

### In a group of 20 students, 6 are sixth graders, 2 are seventh graders, and 12 are eighth graders.  Write the ratio of eighth graders to the total number of students in simplest terms.

3:5
3 to 5
3/5
Explanation
The ratio of eighth graders to the total number of students can be found by dividing the number of eighth graders (12) by the total number of students (20). Simplifying this ratio gives us 3:5, which means that for every 3 eighth graders, there are 5 students in total. Another way to express this ratio is 3 to 5 or 3/5.

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• 3.

• A.

• B.

>

• C.

=

• D.

A.
• 4.

### A horse runs 50 meters per 8 seconds.  Express the horse's speed as a unit rate.

• A.

6

• B.

6.25

• C.

6 meters

• D.

6.25 meters

• E.

6 meters per second

• F.

6.25 meters per second

F. 6.25 meters per second
Explanation
The horse runs 50 meters in 8 seconds, so to express its speed as a unit rate, we divide the distance by the time. Therefore, the horse's speed is 6.25 meters per second.

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• 5.
3
• 6.
238
• 7.
9
• 8.

### Write 5100300000 in scientific notation.

• A.
• B.
• C.
• D.
C.
Explanation
5.1 x 10^9

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• 9.

.001846
0.001846
Explanation
The given question asks to evaluate the number and express the answer in standard form. The numbers .001846 and 0.001846 are already in standard form, as they are written in decimal notation without any trailing zeros. Therefore, the answer is simply the same as the given numbers, .001846 and 0.001846.

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• 10.

### Where should parentheses be placed to make this statement true? 7 + 3 x 5 - 1 = 19

• A.

(7 + 3) x 5 - 1 = 19

• B.

7 + (3 x 5) - 1 = 19

• C.

7 + 3 x (5 - 1) = 19

• D.

(7 + 3) x (5 - 1) = 19

• E.

The equation does not need parentheses to be true. Back to top