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Volume and Mass

Grade 3 · Geometry · Worksheet 2

  1. Ethan has a bag of potatoes that weighs 2 kilograms. Ethan buys another bag of potatoes that weighs 8 kilograms. What is the total weight of both bags of potatoes? Answer: ______________
  2. 126 + 351 = ? Answer: ______________
  3. Noah is helping his teacher fill the classroom fish tank. The tank can hold 15 liters of water. Noah has already poured 8 liters of water into the tank. How many more liters of water does he need to add to fill the tank completely? Answer: ______________
  4. 189 + 357 = ? Answer: ______________
  5. A rectangular fish tank is drawn on grid paper. The tank is 7 squares long and 4 squares wide. Each square represents 1 liter of water. How many liters of water are needed to completely fill the tank? Answer: ______________
  6. Maria is making fruit punch for her class party. She has a large bowl that can hold 15 liters. She has already poured in 8 liters of orange juice. How many more liters of fruit punch can Maria add before the bowl is full? Answer: ______________
  7. A rectangular swimming pool is 12 meters long and 8 meters wide. What is the perimeter of the pool?
    Answer: ______________
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Answer Key & Explanations

Volume and Mass · Grade 3 · Worksheet 2

  1. Ethan has a bag of potatoes that weighs 2 kilograms. Ethan buys another bag of potatoes that weighs 8 kilograms. What is the total weight of both bags of potatoes? Answer: 10 Solution: The first bag weighs 2 kilograms. The second bag weighs 8 kilograms. Add the weights: 2 + 8 = 10.
    Full step-by-step solution

    Step 1: The first bag weighs 2 kilograms. Step 2: The second bag weighs 8 kilograms. Step 3: Add the weights: 2 + 8 = 10. The answer is 10 kilograms.

  2. 126 + 351 = ? Answer: 477 Solution: Write the numbers vertically, aligning by place value: 126 + 351 Add the ones: 6 + 1 = 7. Write 7 in the ones place. Add the tens: 2 + 5 = 7.
    Full step-by-step solution

    Step 1: Write the numbers vertically, aligning by place value: 126 + 351 Step 2: Add the ones: 6 + 1 = 7. Write 7 in the ones place. Step 3: Add the tens: 2 + 5 = 7. Write 7 in the tens place. Step 4: Add the hundreds: 1 + 3 = 4. Write 4 in the hundreds place. The answer is 477.

  3. Noah is helping his teacher fill the classroom fish tank. The tank can hold 15 liters of water. Noah has already poured 8 liters of water into the tank. How many more liters of water does he need to add to fill the tank completely? Answer: 7 Solution: The fish tank can hold 15 liters total. Noah has already poured 8 liters into the tank. To find out how much more is needed, subtract the amount already in the tank from the total capacity: 15 - 8.
    Full step-by-step solution

    Step 1: The fish tank can hold 15 liters total. Step 2: Noah has already poured 8 liters into the tank. Step 3: To find out how much more is needed, subtract the amount already in the tank from the total capacity: 15 - 8. Step 4: 15 - 8 = 7. The answer is 7 liters.

  4. 189 + 357 = ? Answer: 546 Solution: Write the numbers vertically, aligning by place value: 189 + 357 Add the ones: 9 + 7 = 16. Write 6 in the ones place and regroup 1 to the tens place. Add the tens: 8 + 5 + 1 (regrouped) = 14.
    Full step-by-step solution

    Step 1: Write the numbers vertically, aligning by place value: 189 + 357 Step 2: Add the ones: 9 + 7 = 16. Write 6 in the ones place and regroup 1 to the tens place. Step 3: Add the tens: 8 + 5 + 1 (regrouped) = 14. Write 4 in the tens place and regroup 1 to the hundreds place. Step 4: Add the hundreds: 1 + 3 + 1 (regrouped) = 5. Write 5 in the hundreds place. The answer is 546.

  5. A rectangular fish tank is drawn on grid paper. The tank is 7 squares long and 4 squares wide. Each square represents 1 liter of water. How many liters of water are needed to completely fill the tank? Answer: 28 Solution: The tank is 7 squares long and 4 squares wide. To find the total number of squares, multiply the length by the width: 7 × 4 7 × 4 = 28 Since each square represents 1 liter of water, 28 squares means 28 liters.
    Full step-by-step solution

    Step 1: The tank is 7 squares long and 4 squares wide. Step 2: To find the total number of squares, multiply the length by the width: 7 × 4 Step 3: 7 × 4 = 28 Step 4: Since each square represents 1 liter of water, 28 squares means 28 liters. The answer is 28 liters.

  6. Maria is making fruit punch for her class party. She has a large bowl that can hold 15 liters. She has already poured in 8 liters of orange juice. How many more liters of fruit punch can Maria add before the bowl is full? Answer: 7 Solution: The bowl can hold a total of 15 liters. Maria has already poured in 8 liters of juice. To find out how much more the bowl can hold, subtract the amount already in from the total capacity: 15 - 8.
    Full step-by-step solution

    Step 1: The bowl can hold a total of 15 liters. Step 2: Maria has already poured in 8 liters of juice. Step 3: To find out how much more the bowl can hold, subtract the amount already in from the total capacity: 15 - 8. Step 4: 15 - 8 = 7. The answer is 7 liters.

  7. A rectangular swimming pool is 12 meters long and 8 meters wide. What is the perimeter of the pool? Answer: 40 meters Solution: Add both lengths: 12 + 12 = 24 meters Add both widths: 8 + 8 = 16 meters Add all sides together: 24 + 16 = 40 meters The perimeter is 40 meters
    Full step-by-step solution

    Step 1: A rectangle has two lengths and two widths Step 2: Add both lengths: 12 + 12 = 24 meters Step 3: Add both widths: 8 + 8 = 16 meters Step 4: Add all sides together: 24 + 16 = 40 meters Step 5: The perimeter is 40 meters