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Standard Units

Grade 2 · Measurement · Worksheet 3

  1. Sam is building a tower with blocks. He uses 42 red blocks and 37 blue blocks. How many blocks did Sam use in total? Answer: ______________
  2. A bookshelf is 84 cm tall and a table is 57 cm tall. How much taller is the bookshelf than the table? Answer: ______________
  3. A bookshelf is 84 cm tall and a table is 65 cm tall. How much taller is the bookshelf than the table? Answer: ______________
  4. A tree is 184 cm tall and a bush is 95 cm tall. How much taller is the tree than the bush? Answer: ______________
  5. The whiteboard is 84 inches long. The bulletin board is 57 inches long. How much longer is the whiteboard? Answer: ______________
  6. A triangle has sides measuring 25 centimeters, 35 centimeters, and 40 centimeters. What is the perimeter of the triangle?
    Answer: ______________
  7. A triangle has sides measuring 24 centimeters, 32 centimeters, and 40 centimeters. What is the perimeter of the triangle?
    Answer: ______________
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Answer Key & Explanations

Standard Units · Grade 2 · Worksheet 3

  1. Sam is building a tower with blocks. He uses 42 red blocks and 37 blue blocks. How many blocks did Sam use in total? Answer: 79 Solution: Sam used 42 red blocks. Sam used 37 blue blocks. To find the total, add the red blocks and blue blocks: 42 + 37.
    Full step-by-step solution

    Step 1: Sam used 42 red blocks. Step 2: Sam used 37 blue blocks. Step 3: To find the total, add the red blocks and blue blocks: 42 + 37. Step 4: Add the ones place: 2 + 7 = 9. Step 5: Add the tens place: 40 + 30 = 70. Step 6: Combine the tens and ones: 70 + 9 = 79. The answer is 79.

  2. A bookshelf is 84 cm tall and a table is 57 cm tall. How much taller is the bookshelf than the table? Answer: 27 Solution: Identify the heights: bookshelf = 84 cm, table = 57 cm. Subtract the table's height from the bookshelf's height: 84 - 57. Subtract the ones place: 4 - 7.
    Full step-by-step solution

    Step 1: Identify the heights: bookshelf = 84 cm, table = 57 cm. Step 2: Subtract the table's height from the bookshelf's height: 84 - 57. Step 3: Subtract the ones place: 4 - 7. Since 4 is smaller than 7, regroup 1 ten from the tens place. 8 tens become 7 tens, and 4 ones become 14 ones. Step 4: Now subtract the ones: 14 - 7 = 7. Step 5: Subtract the tens: 7 - 5 = 2. Step 6: Combine the results: 20 + 7 = 27. The bookshelf is 27 centimeters taller than the table.

  3. A bookshelf is 84 cm tall and a table is 65 cm tall. How much taller is the bookshelf than the table? Answer: 19 Solution: Identify the heights: bookshelf = 84 cm, table = 65 cm. Subtract the table's height from the bookshelf's height: 84 - 65. Subtract the ones place: 4 - 5.
    Full step-by-step solution

    Step 1: Identify the heights: bookshelf = 84 cm, table = 65 cm. Step 2: Subtract the table's height from the bookshelf's height: 84 - 65. Step 3: Subtract the ones place: 4 - 5. Since 4 is smaller than 5, regroup 1 ten from the tens place. 8 tens become 7 tens, and 4 ones become 14 ones. Step 4: Now subtract the ones: 14 - 5 = 9. Step 5: Subtract the tens: 7 - 6 = 1. Step 6: Combine the results: 10 + 9 = 19. The bookshelf is 19 centimeters taller than the table.

  4. A tree is 184 cm tall and a bush is 95 cm tall. How much taller is the tree than the bush? Answer: 89 Solution: Identify the heights: tree = 184 cm, bush = 95 cm. Subtract the bush's height from the tree's height: 184 - 95. Subtract the ones place: 4 - 5.
    Full step-by-step solution

    Step 1: Identify the heights: tree = 184 cm, bush = 95 cm. Step 2: Subtract the bush's height from the tree's height: 184 - 95. Step 3: Subtract the ones place: 4 - 5. Since 4 is smaller than 5, regroup 1 ten from the tens place. 8 tens become 7 tens, and 4 ones become 14 ones. Step 4: Now subtract the ones: 14 - 5 = 9. Step 5: Subtract the tens place: 7 - 9. Since 7 is smaller than 9, regroup 1 hundred from the hundreds place. 1 hundred becomes 0 hundreds, and 7 tens become 17 tens. Step 6: Now subtract the tens: 17 - 9 = 8. Step 7: The hundreds place: 0 - 0 = 0. Step 8: Combine the results: 80 + 9 = 89. The tree is 89 centimeters taller than the bush.

  5. The whiteboard is 84 inches long. The bulletin board is 57 inches long. How much longer is the whiteboard? Answer: 27 Solution: Identify the lengths: Whiteboard = 84 inches, Bulletin board = 57 inches. To find how much longer the whiteboard is, subtract the bulletin board length from the whiteboard length: 84 - 57. Subtract the ones place: 4 - 7.
    Full step-by-step solution

    Step 1: Identify the lengths: Whiteboard = 84 inches, Bulletin board = 57 inches. Step 2: To find how much longer the whiteboard is, subtract the bulletin board length from the whiteboard length: 84 - 57. Step 3: Subtract the ones place: 4 - 7. Since 4 is smaller than 7, regroup 1 ten from the tens place. 8 tens become 7 tens, and 4 ones become 14 ones. Step 4: Now subtract the ones: 14 - 7 = 7. Step 5: Subtract the tens: 7 - 5 = 2. Step 6: Combine the results: 20 + 7 = 27. The whiteboard is 27 inches longer than the bulletin board.

  6. A triangle has sides measuring 25 centimeters, 35 centimeters, and 40 centimeters. What is the perimeter of the triangle? Answer: 100 Solution: Identify the three side lengths: 25 cm, 35 cm, and 40 cm Add the first two sides: 25 + 35 = 60 Add the third side to the sum: 60 + 40 = 100 The perimeter is 100 centimeters
    Full step-by-step solution

    Step 1: Identify the three side lengths: 25 cm, 35 cm, and 40 cm Step 2: Add the first two sides: 25 + 35 = 60 Step 3: Add the third side to the sum: 60 + 40 = 100 Step 4: The perimeter is 100 centimeters

  7. A triangle has sides measuring 24 centimeters, 32 centimeters, and 40 centimeters. What is the perimeter of the triangle? Answer: 96 Solution: Identify the three side lengths: 24 cm, 32 cm, and 40 cm Add the first two sides: 24 + 32 = 56 Add the third side to the sum: 56 + 40 = 96 The perimeter is 96 centimeters
    Full step-by-step solution

    Step 1: Identify the three side lengths: 24 cm, 32 cm, and 40 cm Step 2: Add the first two sides: 24 + 32 = 56 Step 3: Add the third side to the sum: 56 + 40 = 96 Step 4: The perimeter is 96 centimeters