Questions: 11. Jack's paper airplane was 12 centimeters long, and Caleb's paper was 121 millimeters long. Whose paper airplane was the longest? Answer: 12. Omar removed his shoelaces. One shoelace was 85 centimeters long, and was 90 centimeters long. How long were the shoelaces altogether in millimeters? Answer: 175 13. Courtney laid out 7 candy bars next to each other, and they measured in millimeters. How long were the candy bars in centimeters? Answer: 14. Caleb's dog was 350 centimeters tall. Zach's dog was 4 meters tall. Which dog was taller, and by how much? Answer: 15. Tom's dad asked him to trim the shrubs in the front yard from 321 centimeters tall to 3 meters tall. How many centimeters must Tom cut the shrubs to make them 3 meters tall? Answer: 16. Brittany had a piece of string that was 190 centimeters long. How long is it in meters? Answer: 2000 17. How many centimeters is a 7.6-meter block of wood? Answer: 18. Hailey laid six 8.4 centimeters of paper end to end. How long were the lengths of paper in millimeters? Answer:

11. Jack's paper airplane was 12 centimeters long, and Caleb's paper was 121 millimeters long. Whose paper airplane was the longest? Answer: 12. Omar removed his shoelaces. One shoelace was 85 centimeters long, and was 90 centimeters long. How long were the shoelaces altogether in millimeters? Answer: 175 13. Courtney laid out 7 candy bars next to each other, and they measured in millimeters. How long were the candy bars in centimeters? Answer: 14. Caleb's dog was 350 centimeters tall. Zach's dog was 4 meters tall. Which dog was taller, and by how much? Answer: 15. Tom's dad asked him to trim the shrubs in the front yard from 321 centimeters tall to 3 meters tall. How many centimeters must Tom cut the shrubs to make them 3 meters tall? Answer: 16. Brittany had a piece of string that was 190 centimeters long. How long is it in meters? Answer: 2000 17. How many centimeters is a 7.6-meter block of wood? Answer: 18. Hailey laid six 8.4 centimeters of paper end to end. How long were the lengths of paper in millimeters? Answer:
Transcript text: 11.Jack's paper airplane was 12 centimeters long, and Caleb's paper was 121 millimeters long. Whose paper airplane was the longest? Answer: $\qquad$ 12. Omar removed his shoelaces. One shoelace was 85 centimeters long, an was 90 centimeters long. How long were the shoelaces altogether in mill Answer: $\qquad$ $\begin{array}{r}885 \\ +98 \\ \hline 175\end{array}$ 13. Courtney laid out 7 candy bars next to each other, and they measure millimeters. How long were the candy bars in centimeters? Answer: $\qquad$ 14. Caleb's dog was 350 centimeters tall. Zach's dog was 4 meters tall. dog was taller, and by how much? Answer: $\qquad$ 15.Tom's dad asked him to trim the shrubs in the front yard from 321 centimeters tall to 3 meters tall. How many centimeters must Tom cut the shrubs to make them 3 meters tall? Answer: $\qquad$ 16. Brittany had a piece of string that was 190 centimeters long. How long it in meters? Answer: $\qquad$ 2000 17. How many centimeters is a 7.6 -meter block of wood? Answer: $\qquad$ 18. Hailey laid six 8.4 centimeters of paper end to end. How long were the lir of paper in millimeters? Answer: $\qquad$
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Solution

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Solution Steps

Solution Approach

  1. Question 11: Convert both lengths to the same unit (either centimeters or millimeters) and compare them to determine whose paper airplane is longer.

  2. Question 12: Convert the lengths of the shoelaces from centimeters to millimeters, then add them together to find the total length in millimeters.

  3. Question 13: Convert the total length of the candy bars from millimeters to centimeters.

Step 1: Comparing Paper Airplane Lengths

To determine whose paper airplane is longer, we convert Caleb's paper airplane length from millimeters to centimeters: \[ \text{Caleb's length in cm} = \frac{121 \text{ mm}}{10} = 12.1 \text{ cm} \] Now we compare the lengths: \[ \text{Jack's length} = 12 \text{ cm} \quad \text{and} \quad \text{Caleb's length} = 12.1 \text{ cm} \] Since \( 12.1 > 12 \), Caleb's paper airplane is longer.

Step 2: Total Length of Shoelaces

Next, we find the total length of Omar's shoelaces in millimeters. First, we convert each shoelace length from centimeters to millimeters: \[ \text{Total length in mm} = (85 \text{ cm} + 90 \text{ cm}) \times 10 = 1750 \text{ mm} \]

Step 3: Total Length of Candy Bars

For the candy bars, we assume each candy bar is 10 mm long. Thus, the total length of 7 candy bars in millimeters is: \[ \text{Total length in mm} = 7 \times 10 = 70 \text{ mm} \] Now, we convert this total length to centimeters: \[ \text{Total length in cm} = \frac{70 \text{ mm}}{10} = 7.0 \text{ cm} \]

Final Answer

  • The longest paper airplane is Caleb's.
  • The total length of the shoelaces is \( \boxed{1750 \text{ mm}} \).
  • The total length of the candy bars is \( \boxed{7.0 \text{ cm}} \).
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