Printable Measurement Worksheet for 8-Year-Olds — Length (cm) & Mass (g/kg) Word Problems, Ruler Reading, Drawing Lines

Instructions

1. Read each question carefully.
2. Use the space below each question to show your work and write your final answer.
3. Remember: 100 cm = 1 m and 1000 g = 1 kg.
4. You will need a pencil and a ruler for Section D.
5. Try your best and have fun being a measurement detective!

Part 1: Measuring Length (cm and m)

Section A: How Long Is It?

Imagine an object placed next to a ruler. Find its length.

Example: A paperclip starts at the 2 cm mark and ends at the 5 cm mark. How long is it? Answer: 5 cm - 2 cm = 3 cm.

1. A crayon starts at the 4 cm mark and ends at the 11 cm mark. How long is the crayon?

2. A toy car starts at the 8 cm mark and ends at the 15 cm mark. How long is the toy car?

3. A glue stick starts at the 0 cm mark and ends at the 9 cm mark. How long is the glue stick?

4. A key starts at the 13 cm mark and ends at the 18 cm mark. How long is the key?

5. An eraser starts at the 21 cm mark and ends at the 25 cm mark. How long is the eraser?

Section B: Solving Length Puzzles

Read the stories and solve the measurement problems.

1. A red ribbon is 35 cm long. A blue ribbon is 42 cm long. What is the total length of both ribbons if you place them end to end?

2. My storybook is 28 cm tall. My little brother's board book is 15 cm tall. How much taller is my book?

3. Liam built a Lego tower that was 60 cm tall. His cat knocked over the top, and now it is only 45 cm tall. How many centimeters of the tower broke off?

4. A scarf is 95 cm long. A belt is 78 cm long. Which item is shorter?

5. A snake plant is 48 cm tall. A month later, it has grown 7 cm taller. What is its new height?

6. Maria's hair was 40 cm long. She got a haircut and the hairdresser cut off 12 cm. How long is her hair now?

7. A lunchbox is 22 cm wide. If you place 3 identical lunchboxes side-by-side, what is the total width?

8. A roll of tape has 500 cm of tape. If you use 150 cm for wrapping presents, how much tape is left on the roll?

9. Each floor of a dollhouse is 15 cm high. How tall is a dollhouse with 4 floors?

10. A jump rope is 210 cm long. A skipping rope is 185 cm long. What is the difference in their lengths?

Section C: More or Less Than a Meter?

A meter is 100 cm long. Think about objects in your classroom or home. For each object, circle if it is more or less than 1 meter long.

1. The height of your chair's seat. more / less than 1 meter

2. The width of the classroom door. more / less than 1 meter

3. The length of a new, unsharpened pencil. more / less than 1 meter

4. The length of your arm from your shoulder to your fingertips. more / less than 1 meter

5. The length of the longest wall in the room. more / less than 1 meter

Section D: Draw and Label the Lines

Use your ruler to draw the lines in the space below. Label each line with its name (A, B, C) and its length.

1. Draw Line A to be exactly 9 cm long.

2. Draw Line B to be 3 cm shorter than Line A.

3. Draw Line C to be 2 cm longer than Line A.

(Use this space to draw your three labeled lines)

Part 2: Measuring Mass (g and kg)

Section E: Solving Mass Puzzles

Read the stories and solve the measurement problems.

1. A baker uses 450 g of flour for bread and 300 g of flour for a cake. How much flour did he use in total?

2. A puppy weighs 5 kg. A full-grown dog weighs 28 kg. How much more does the full-grown dog weigh?

3. One apple weighs about 150 g. What is the total mass of 3 identical apples?

4. A jar of jam has a mass of 480 g. After a week, 120 g of jam has been eaten. What is the mass of the jam left in the jar?

5. A bag of potatoes weighs 2 kg. What is the total mass of 5 bags of potatoes?

6. My cat weighs 4 kg. My hamster weighs 150 g. Which pet is heavier?

7. A large watermelon has a mass of 3 kg. A small cantaloupe has a mass of 800 g. What is the total mass of both fruits in grams? (Hint: First, change kg to g!)

8. A box filled with books weighs 12 kg. The empty box weighs 1 kg. What is the total mass of just the books?

Answer Key

Section A: How Long Is It?

1. 11 cm - 4 cm = 7 cm
2. 15 cm - 8 cm = 7 cm
3. 9 cm - 0 cm = 9 cm
4. 18 cm - 13 cm = 5 cm
5. 25 cm - 21 cm = 4 cm

Section B: Solving Length Puzzles

1. 35 cm + 42 cm = 77 cm
2. 28 cm - 15 cm = 13 cm
3. 60 cm - 45 cm = 15 cm
4. The belt is shorter (78 cm is less than 95 cm).
5. 48 cm + 7 cm = 55 cm
6. 40 cm - 12 cm = 28 cm
7. 22 cm × 3 = 66 cm
8. 500 cm - 150 cm = 350 cm
9. 15 cm × 4 = 60 cm
10. 210 cm - 185 cm = 25 cm

Section C: More or Less Than a Meter?

1. less
2. less (Most doors are about 2 meters high, but less than 1 meter wide)
3. less
4. less
5. more

Section D: Draw and Label the Lines

1. Line A should be drawn and labeled 9 cm.
2. Line B should be drawn and labeled 6 cm (9 cm - 3 cm).
3. Line C should be drawn and labeled 11 cm (9 cm + 2 cm).

Section E: Solving Mass Puzzles

1. 450 g + 300 g = 750 g
2. 28 kg - 5 kg = 23 kg
3. 150 g × 3 = 450 g
4. 480 g - 120 g = 360 g
5. 2 kg × 5 = 10 kg
6. The cat is heavier (4 kg is much more than 150 g).
7. 3 kg = 3000 g. So, 3000 g + 800 g = 3800 g.
8. 12 kg - 1 kg = 11 kg