Five-Minute Check (over Lesson 2-1)

Main Idea

Targeted TEKS

Example 1: Compare Positive Rational Numbers

Example 2: Compare Using Decimals

Example 3: Order Rational Numbers

Example 4: Compare Negative Rational Numbers

Example 5: Compare Negative Rational Numbers

Compare Positive Rational Numbers

Write as fractions with the same denominator.

Answer:

Replace ■ with <, >, or = to make ■ a true sentence.

A. A

B. B

C. C

D. D A B C D

0% 0%0%0%

A. >

B. <

C. =

D. None of the above.

Replace ■ with <, >, or = to make ■ a true sentence.

Compare Using Decimals

Express as a decimal.

In the tenths place, 7 > 6.

Answer:

Replace ■ with <, >, or = to make 0.7 ■ a true sentence.

■

■

1. A

2. B

3. C

4. D

0%0%0%0%

A B C D

A. >

B. <

C. =

D. None of the above.

Replace ■ with <, >, or = to make ■ 0.5 a true sentence.

CHEMISTRY The values for the approximate densities of various substances are shown in the table. Order the densities from least to greatest.

Order Rational Numbers

Write each fraction as a decimal.

Order Rational Numbers

Answer: From the least to the greatest, the densities are

1. A

2. B

3. C

4. D

0%0%0%0%

A B C D

AMUSEMENT PARKS The ride times for five amusement park attractions are shown in the table. Order the lengths from least to greatest.

A.

B.

C.

D.

Replace ■ with <, >, or = to make –4.62 ■ –4.7 a true sentence.

–4.62 ■ –4.7

Graph the decimals on a number line.

Answer: Since –4.62 is to the right of –4.7, –4.62 > –4.7.

Compare Negative Rational Numbers

A. A

B. B

C. C

D. D A B C D

0% 0%0%0%

A. <

B. >

C. =

D. None of the above.

Replace ■ with <, >, or = to make –2.67 ■ –2.7 a true sentence.

Since the denominations are the same, compare the numerators.

Compare Negative Rational Numbers

Replace ■ with <, >, or = to make a true sentence.

Answer:

A. A

B. B

C. C

D. D A B C D

0% 0%0%0%

A. >

B. <

C. =

D. None of the above.

Replace ■ with <, >, or = to make a true sentence.