MSTAR Practice Worksheet

Lesson 3-7: Ratio Reasoning: Convert Measurements Between Systems

Grade 6 Mathematics · Standard 6.AT.3c

Name: Date:

These are MSTAR-style questions written for this curriculum to rehearse the format. They are not official Maryland assessment items. MSTAR — Maryland's new state test, first given in spring 2027 — uses the same kinds of questions you see here: selected response, select-all, two-part evidence questions, and written responses.

Part A — Skills Check

Warm up with the lesson's core skills — one best answer each.

Question 1Selected response · 1 point

1 kilometer ≈ 0.6 mile. About how many miles is 5 kilometers?

A3 miles
B5.6 miles
C8 miles
D30 miles

Question 2Selected response · 1 point

1 pound ≈ 0.45 kilogram. About how many kilograms is 10 pounds?

A4.5 kg
B10.45 kg
C22 kg
D45 kg

Question 3Selected response · 1 point

Which pair of units comes from two DIFFERENT measurement systems?

AInches and feet
BCups and quarts
CGrams and kilograms
DMiles and kilometers

Question 4Selected response · 1 point

A sign in Mexico gives a distance of 80 kilometers. Using 1 km ≈ 0.6 mi, about how far is that in miles?

AAbout 8 miles
BAbout 48 miles
CAbout 80 miles
DAbout 133 miles

Question 5Selected response · 1 point

A dog weighs 31 pounds. Flea medicine comes in packages for 4–10 kg, 10–25 kg, and 25–40 kg. Which package is correct?

AThe 4–10 kg package
BThe 10–25 kg package
CThe 25–40 kg package
DNone — 31 is above every range

Question 6Selected response · 1 point

One of the academy's suppliers ships olive oil in 4-liter tins. Using 1 liter ≈ 1.06 quarts, about how many quarts of oil are in one tin?

AAbout 3.77 quarts
BAbout 4.24 quarts
CAbout 5.06 quarts
DAbout 42.4 quarts

Part B — Test-Format Questions

These match the state test's formats: two-part questions, select-all, and written responses.

Question 7Two-part question

Part A

A backpack weighs 5 kilograms. Using 1 kilogram ≈ 2.2 pounds, about how much does it weigh in pounds?

Fill in the bubble next to the one best answer.

A2.27 pounds
B7.2 pounds
C10 pounds
D11 pounds

Part B

Answer Part A before Part B — Part B asks about your reasoning.

Why is the symbol ≈ used in the conversion 1 kilogram ≈ 2.2 pounds?

AThe symbol means the units are unrelated.
BPounds and kilograms measure different quantities.
CThe conversion between these systems is approximate, not exact.
DThe conversion only works for small numbers.

Question 8Select all that apply

Select ALL statements that are true about converting measurements between systems:

Mark the box next to EVERY answer that is true. More than one is correct.

AA conversion ratio connects a unit in one system to a unit in another.
BConverting to a smaller unit produces a larger number.
CBetween-system conversions are often approximate.
DThe two measurements describe different physical amounts after converting.
EA ratio table can organize a between-system conversion.

Part C — Show Your Thinking

Answer in writing, the way the state test's constructed responses work.

Question 9Written response · 2 points

The Golden Gate Bridge can hold about 35,924,000 pounds. An average midsize car weighs about 1,524 kilograms. Using 1 kilogram ≈ 2.2 pounds, about how many midsize cars could be on the bridge at one time? Explain each step, and say why your answer is an estimate.

Write your answer in complete sentences. Show or explain your mathematical thinking.