Estimate Lengths

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Estimate Lengths · Grade 2 · Worksheet 1

1. Matiu is looking at his new bookshelf. He wants to estimate how tall it is in feet. If the bookshelf is about as tall as two yardsticks stacked on top of each other, about how many feet tall is Matiu's bookshelf? Answer: 6 feet Solution: One yardstick is 3 feet long. The bookshelf is as tall as two yardsticks. To find the total height in feet, add 3 feet + 3 feet = 6 feet.
   Full step-by-step solution

   Step 1: One yardstick is 3 feet long. Step 2: The bookshelf is as tall as two yardsticks. Step 3: To find the total height in feet, add 3 feet + 3 feet = 6 feet. The bookshelf is about 6 feet tall. Answer: 6 feet

2. Mere estimates that her desk is about 80 centimeters long. About how many centimeters long is Mere's desk? Answer: 80 centimeters Solution: Read the problem carefully. It says Mere estimates her desk is about 80 centimeters long. The word 'estimate' means a reasonable guess.
   Full step-by-step solution

   Step 1: Read the problem carefully. It says Mere estimates her desk is about 80 centimeters long. Step 2: The word 'estimate' means a reasonable guess. Mere's guess is 80 centimeters. Step 3: The question asks: 'About how many centimeters long is Mere's desk?' The answer is the estimate she gave. Final answer: 80 centimeters.

3. Aroha estimates that her jump rope is about 90 centimeters long. Tane estimates that his jump rope is about 120 centimeters long. About how many centimeters longer is Tane's jump rope than Aroha's? Answer: 30 centimeters Solution: Write the two estimates: Aroha's rope is about 90 cm, Tane's rope is about 120 cm. To find how much longer Tane's rope is, subtract the smaller number from the larger number: 120 - 90.
   Full step-by-step solution

   Step 1: Write the two estimates: Aroha's rope is about 90 cm, Tane's rope is about 120 cm. Step 2: To find how much longer Tane's rope is, subtract the smaller number from the larger number: 120 - 90. Step 3: Think of 120 as 12 tens and 90 as 9 tens. 12 tens minus 9 tens equals 3 tens, which is 30. Step 4: So, 120 - 90 = 30. Final answer: Tane's jump rope is about 30 centimeters longer than Aroha's.

4. A classroom has a rectangular rug that is 8 feet long and 5 feet wide. What is the total distance around the rug? Answer: 26 feet Solution: A rectangle has two equal lengths and two equal widths. The perimeter is the total distance around, so we add all four sides: length + width + length + width. This is the same as (2 × length) + (2 × width).
   Full step-by-step solution

   Step 1: A rectangle has two equal lengths and two equal widths. Step 2: The perimeter is the total distance around, so we add all four sides: length + width + length + width. Step 3: This is the same as (2 × length) + (2 × width). Step 4: Calculate 2 × 8 feet = 16 feet. Step 5: Calculate 2 × 5 feet = 10 feet. Step 6: Add the two results: 16 feet + 10 feet = 26 feet. The total distance around the rug is 26 feet.

5. A rectangular garden has a length of 25 meters and a width of 15 meters. What is the total distance around the garden? Answer: 80 Solution: To find the total distance around the garden, we need to calculate the perimeter of the rectangle. Recall the formula for the perimeter of a rectangle. The perimeter P is given by: P = 2 * (length + width) Identify the given values from the problem.
   Full step-by-step solution

   To find the total distance around the garden, we need to calculate the perimeter of the rectangle. Step 1: Recall the formula for the perimeter of a rectangle. The perimeter P is given by: P = 2 * (length + width) Step 2: Identify the given values from the problem. Length = 25 meters Width = 15 meters Step 3: Substitute the given values into the formula. P = 2 * (25 + 15) Step 4: Perform the calculation inside the parentheses first. 25 + 15 = 40 Step 5: Multiply the result by 2. P = 2 * 40 = 80 Step 6: State the final answer with the correct units. The total distance around the garden is 80 meters.

6. Mason wants to estimate the length of his new crayon in inches. He knows that a brand-new crayon is usually about 3 inches long. His crayon looks a little longer than a new one because he hasn't used it yet. About how many inches long do you think Mason's crayon is? Answer: About 3 inches Solution: Mason knows a brand-new crayon is usually about 3 inches long. His crayon is a little longer than a new one because it hasn't been used.
   Full step-by-step solution

   Step 1: Mason knows a brand-new crayon is usually about 3 inches long. Step 2: His crayon is a little longer than a new one because it hasn't been used. Step 3: A good estimate would be close to 3 inches, like 3 inches or maybe 4 inches, but since it's only a little longer, 3 inches is the best estimate. Step 4: The answer is about 3 inches.