Homework Helper Chapter 9 Lesson 9.1 about 6 centimeters 4. 11 centimeters – 3 centimeters = 8 centimeters about 8 centimeters When I use a unit cube to measure the length of an object I line up the left edge of a cube under the left end of the object. I make marks for the cube lengths along the entire length of the object and then I count the spaces to find the total length. Lesson Check/Spiral Review: 6 10:00 4:40 22 0.37; 37

Homework Helper Chapter 9 Lesson 9.2 6 centimeters 9 centimeters Check to make sure children’s drawing is about twice as long as the length of the string. Possible answer: I chose exercise #2. Since the pen was 11 cm long, I knew the eraser had to be less than that. The only estimate that was less was 4 centimeters, which is why that was the best choice. Lesson Check/Spiral Review: 5 35 79 19 0.17; 17

Homework Helper Chapter 9 Lesson 9.3 9 centimeters 12 centimeters Check to make sure children’s drawing is 8 centimeters long. 8 centimeters Answers for #4 will vary depending upon the actual object measured. 4. Possible answer: My desk is 42 centimeters long. I found the length by lining up the end of my ruler with the corner of my desk. Then, I marked where the ruler ended, picked it up and placed it at the end mark. I kept going until I got to the end of the desk. Finally, I counted how many many total centimeters I needed for the entire length of my desk. Lesson Check/Spiral Review: 12 4:05 0.21; 21 2

Homework Helper Chapter 9 Lesson 9.4 1. 8 20 20 – 8 = The straw is 12 centimeters long now 2. I would draw a mark above the number line from 0 to 13 for the first ribbon. Then, I would draw a second mark for the second ribbon, starting at 13 and making it 5 more spaces long. The total length for the two ribbons is 18 centimeters long. 13 5 Lesson Check/Spiral Review: 17 472 7:30 0.75; 75

Homework Helper Chapter 9 Lesson 9.5 Answers for questions #1 and #2 will depend upon the actual objects measured. 3. Meters are longer than centimeters, so it takes fewer meters than centimeters, so it takes fewer meters than centimeters to measure the same length. I would measure the length of a bench in meters because meters are longer than centimeters. So, it would take fewer meters than centimeters to measure the length of a bench. Lesson Check/Spiral Review: 14 possible answer: 5 dimes and 3 nickels feet inches 4. 645 5. possible answer: 4 quarters

Homework Helper Chapter 9 Lesson 9.6 The estimates for #1 and #2 should be reasonable and may vary depending on the actual object. 1. poster about meters 2. chalkboard about meters 3. table meter stick meter stick meter stick meter stick Barbara’s meter sticks Luke’s meter sticks about 4 meters Possible answer: I thought about the length of one meter and then I thought about how many meters it would take to match the length of the object I am estimating. Lesson Check/Spiral Review: 1 2 2.85 1.15

Homework Helper Chapter 9 Lesson 9.7 1. 11 8 11 8 3 3 2. 11 8 3 3 2. ribbon – 24 centimeters string – 11 centimeters 24 centimeters – 11 centimeters = 13 centimeters OR The ribbon is 13 centimeters longer. I subtracted 11 centimeters from 24 centimeters to get a difference of 13 centimeters. One string is 7 centimeters longer than the other string because 17 centimeters minus 10 centimeters is a difference of 7 centimeters. Lesson Check/Spiral Review: 8 centimeters longer 2. 0.75; 75 3. 7 (check children’s estimates for reasonableness ) 4. 2:30