Unit 4 MSTAR-Style Practice Test — Form A

Understand and Use Percentages · 5 questions · English only, like the real test · No timer — take the time you need.

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.

How this works: Answer every question, then press Submit & Grade. Selected-response parts grade instantly with an explanation for each; written responses go to your teacher. Your answers save on this device.

On the real MSTAR: math runs as three 40-minute sessions, in English, on a computer. Here there is no clock — practice the thinking first; the pacing comes with rehearsal.

Written responses: how should the explain-the-error questions be scored?

Instant scoring checks whether your explanation states the value and uses the reasoning the question is about. It matches words and numbers, so a right answer worded differently can score low — your teacher can always re-score it from the answer key.

16.AT.4Understand Percent

Select all that apply

Select ALL statements that correctly represent a rate per 100 or compare percents to one whole:

100% represents exactly one whole quantity. 45 out of 100 squares shaded on a 10×10 grid represents 45%. A percent greater than 100% represents an amount that is more than the original whole. 0.5% is equal to 50 out of 100. A percent is a ratio that compares a number to 100.

26.AT.4Relate Fractions, Decimals, and Percentages

Explain the error

Elena wrote that 0.08 is equal to 80% because 'there is an 8 in the number.'

Explain Elena's misconception and determine the correct percent value.

✍️ Written response — 2 points.

36.AT.4Estimate the Percent of a Number

Part A

A jacket originally priced at $78.99 is on sale for 25% off. Which is the best estimate of the discount amount?

$8 $10 $20 $40

Part B

Which benchmark strategy gives the most accurate estimate in Part A?

Round 25% to 10% and multiply by $78.99. Round $78.99 to $80 and find 1/4 of $80 (half of $80 is $40, and half of $40 is $20). Round $78.99 to $100 and subtract 25. Divide $78.99 by 25.

46.AT.4Find and Compare with Percentages

Part A

At West Middle School, 45% of the 360 sixth-grade students participate in after-school sports. How many sixth-grade students participate in sports?

144 students 160 students 162 students 180 students

Part B

Which calculation method accurately justifies this solution in Part A?

Multiply the decimal representation of the percent by the whole: 0.45 × 360 = 162. Subtract 45 from 360: 360 - 45 = 315. Divide 360 by 45: 360 ÷ 45 = 8. Multiply 360 by 4.5: 360 × 4.5 = 1,620.

56.AT.4Determine the Whole Given the Part and Percent

Select all that apply

A theater is at 80% capacity with 240 seats occupied. Select ALL statements that are mathematically true regarding this situation:

The total seating capacity of the theater is 300 seats (240 ÷ 0.80 = 300). There are 60 empty seats in the theater (300 - 240 = 60). 10% of the theater capacity is 30 seats (300 ÷ 10 = 30). The total capacity is 192 seats (240 × 0.80 = 192). A tape diagram with 5 equal units of 60 seats represents the 300 total seats (4 units = 240 = 80%).