Ordering Rational Numbers in Mathematical and Real-World Contexts(TEKS.Math.6.2.D)

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Texas 6th Grade Math › Ordering Rational Numbers in Mathematical and Real-World Contexts(TEKS.Math.6.2.D)

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1

Temperature readings: Monday 2.5°F, Tuesday -1.3°F, Wednesday -0.5°F, Thursday 3°F. Order the days from coldest to warmest.

Thursday, Monday, Wednesday, Tuesday

0

Tuesday, Wednesday, Monday, Thursday

CORRECT

Wednesday, Tuesday, Monday, Thursday

0

Monday, Thursday, Tuesday, Wednesday

0

Explanation

Coldest means the lowest number. On a number line: -1.3 < -0.5 < 2.5 < 3, so Tuesday (coldest), then Wednesday, Monday, Thursday (warmest). A common mistake is to look at absolute values and think -0.5 is colder than -1.3 because 0.5 < 1.3, but real temperatures get colder as the value becomes more negative.

2

Golf scores relative to par: Alex -2, Bella +1, Carlos -3, Dana 0. Order the players from best to worst performance.

Bella, Dana, Alex, Carlos

0

Dana, Alex, Carlos, Bella

0

Alex, Carlos, Dana, Bella

0

Carlos, Alex, Dana, Bella

CORRECT

Explanation

In golf, lower scores are better. Order the numbers from least to greatest: -3 < -2 < 0 < +1 gives Carlos (best), Alex, Dana, Bella (worst). A trap is to think 0 is automatically best or to compare absolute values; but performance aligns with the actual order on the number line, not closeness to zero.

3

Bank account balances: Emma -\$15.50, Jayden \$4.75, Mia -\$3.25, Noah \$0. Order the balances from lowest to highest.

Emma, Mia, Noah, Jayden

CORRECT

Jayden, Noah, Mia, Emma

0

Emma, Jayden, Mia, Noah

0

Noah, Emma, Mia, Jayden

0

Explanation

Lowest balance means most negative. On a number line: -15.50 < -3.25 < 0 < 4.75, so Emma, then Mia, then Noah, then Jayden. A common error is to ignore the signs and order by the size of the digits, or to think 0 is lower than negatives. In real life, owing money (negative) is less than having no money or a positive balance.

4

Depths relative to sea level: Buoy A -3 m, Buoy B -2 m, Buoy C -0.5 m, Buoy D +1/3 m. Order the buoys from deepest below sea level to highest above sea level.

Buoy D, Buoy C, Buoy B, Buoy A

0

Buoy A, Buoy C, Buoy B, Buoy D

0

Buoy A, Buoy B, Buoy C, Buoy D

CORRECT

Buoy B, Buoy A, Buoy C, Buoy D

0

Explanation

Deeper means more negative. Order the values from least to greatest: -3 < -2 < -0.5 < +1/3, so Buoy A, Buoy B, Buoy C, Buoy D. A trap is confusing opposites and reciprocals: -2 and -1/2 are reciprocals, not opposites, and -1/2 is actually greater than -2 (so it is shallower).

5

Stock price changes in one day: Company W -\$1.25, Company X +\$1.10, Company Y -\$0.75, Company Z +\$0.40. Order the companies from worst (largest loss) to best (largest gain).

Company X, Company Z, Company Y, Company W

0

Company W, Company Y, Company Z, Company X

CORRECT

Company Y, Company W, Company Z, Company X

0

Company W, Company Z, Company Y, Company X

0

Explanation

Largest loss is the smallest (most negative) number; largest gain is the greatest (most positive). Order: -1.25 < -0.75 < +0.40 < +1.10, so W, Y, Z, X. Reversing the order or mixing a positive gain in between losses ignores how the number line models losses (negative) and gains (positive).