Quiz & test questions Grade 3 Math

A Day at Clearwater Springs Water Plant: A Grade 3 Math Quiz

A 24-point grade 3 quiz mixing multiple-choice, short-answer, and computation items on liters, a scaled bar graph, and two-step problems at a fictional plant.

Grade: Grade 3
Subject: Math
Material: Quiz & test questions
Time: 30 min
Prep: No prep
Materials: None

Standards

3.MD.A.2 Common Core Math

Measure and estimate liquid volumes and masses of objects using standard units of grams (g), kilograms (kg), and liters (l). Add, subtract, multiply, or divide to solve one-step word problems involving masses or volumes that are given in the same units, e.g., by using drawings (such as a beaker with a measurement scale) to represent the problem.

How this material aligns: Items 1, 2, and 3 have students add and multiply liters and pick the best estimate of a container's liquid volume in liters, the one-step volume work this standard covers.

All materials for 3.MD.A.2 →

3.OA.D.8 Common Core Math

Solve two-step word problems using the four operations. Represent these problems using equations with a letter standing for the unknown quantity. Assess the reasonableness of answers using mental computation and estimation strategies including rounding.

How this material aligns: Items 4 and 7 are two-step word problems using the four operations, and item 8 checks whether an estimate is reasonable, exactly what this standard requires.

All materials for 3.OA.D.8 →

3.MD.B.3 Common Core Math

Draw a scaled picture graph and a scaled bar graph to represent a data set with several categories. Solve one- and two-step 'how many more' and 'how many less' problems using information presented in scaled bar graphs.

How this material aligns: Items 5 and 6 have students read a scaled bar graph where each square stands for ten liters and solve a how-many-more comparison, matching this standard.

All materials for 3.MD.B.3 →

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This material is in the public domain (CC0) and may be copied, edited, and shared freely, without attribution. Updated 2026-07-23.

Objectives

Students will solve one- and two-step water problems using liters and the four operations.
Students will read a scaled bar graph and pick the best estimate of a liquid volume.

Vocabulary

Key words: liter, estimate, scaled bar graph, operator

Teacher overview

This 30-minute quiz is worth 24 points and follows a worker through one day at the fictional Clearwater Springs water plant. It mixes two multiple-choice items, two short-answer or reasoning items, and four computation items so teachers see both recall and application. The math covers grade 3 liters, a scaled bar graph, and two-step problems, and it pairs with the plant-themed lessons and problem sets in this grade. Point values appear on every item, and the answer key shows the full steps for each computation.

A Day at Clearwater Springs Water Plant: A Grade 3 Math Quiz — Grade 3 Math

Name: ____________________________ Date: ______________

Assessment

A worker called an operator cleans water at Clearwater Springs. Answer the questions about the worker's day. All water is measured in liters.

(2 points) A tank holds 60 liters. The worker adds 40 liters. How many liters are in the tank now?
- A) 20 liters
- B) 80 liters
- C) 100 liters
- D) 24 liters
(3 points) A pump moves 50 liters into each of 4 buckets. How many liters is that in all? Show your work.
(2 points) Which is the best guess for the water in a large bucket?
- A) 1 liter
- B) 10 liters
- C) 100 liters
- D) 1000 liters
(4 points) The plant cleaned 320 liters in the morning and 250 liters at night. How many liters is that in all? Then how many more liters are needed to reach 700?
(2 points) A bar graph shows liters tested at three stations. Each square stands for 10 liters. Station A's bar is 4 squares long. How many liters is that?
(3 points) On the same graph, Station B's bar is 6 squares and Station C's bar is 3 squares. How many more liters were tested at Station B than at Station C?
(4 points) The worker fills 6 jugs with 20 liters each. Then the worker pours out 30 liters. How many liters are left?
(4 points) The worker guessed the plant would clean about 600 liters. It cleaned 570 liters. Was 600 a good guess? Tell how you know.

From Water for Schools (waterforschools.org). This material is in the public domain (CC0) and may be copied, edited, and shared freely.

Answer Key

Answer: C) 100 liters. 60 + 40 = 100 liters, so choice C is correct; choice A subtracts and choice B misadds.
Answer: 200 liters. 4 buckets × 50 liters = 200 liters.
Answer: B) 10 liters. A large bucket holds about 10 liters; 1 liter is far too little and 100 or 1000 liters is far too much.
Answer: 130 liters. Step 1: 320 + 250 = 570 liters cleaned. Step 2: 700 − 570 = 130 more liters needed.
Answer: 40 liters. Each square is 10 liters, so 4 squares × 10 = 40 liters.
Answer: 30 liters. Station B is 6 squares (60 liters) and Station C is 3 squares (30 liters), so 60 − 30 = 30 more liters.
Answer: 90 liters. Step 1: 6 jugs × 20 liters = 120 liters. Step 2: 120 − 30 = 90 liters left.
Answer: Yes. 570 liters rounds to 600 liters, so 600 was a good guess because it is very close to the exact amount.

Differentiation

Support

Allow a printed times chart and base-ten blocks for the computation items, and set up the two-step items with the "Step 1 / Step 2" boxes students used during instruction. Read each item aloud for students who need it, and give partial credit for a correct first step on items 4 and 7.

Extension

Ask students to write a new two-step item about the plant that ends with an answer of 150 liters, then trade and solve. Have them explain why the estimate in item 8 would still be reasonable if the plant had cleaned 610 liters instead.

ELL supports

Pre-teach "tank," "pump," "jug," and "guess" with labeled pictures at the top of the quiz. Provide the sentence frame for item 8: "600 is a good guess because 570 is ___ to 600." Allow students to show computation work with a labeled drawing where the item does not require sentences.