MATHEMATICS2 Q2 4 measure and compare lengths of objects, in meters .pptx

matatag Mathematics

1. Measuring Length: Meters and Centimeters

2. Welcome to Measuring Length! Today we'll learn how to measure things We'll use meters (m) and centimeters (cm) Can you think of things we might measure?

3. What is a Meter? A meter is about as tall as a doorknob It's a big unit for measuring long things Can you stretch your arms out to show a meter?

4. What is a Centimeter? A centimeter is much smaller than a meter It's about as wide as your fingernail There are 100 centimeters in one meter Can you show how big a centimeter is with your fingers?

5. Tools for Measuring Rulers: for small things (usually in cm) Meter sticks: for bigger things (1 meter long) Measuring tapes: for long or curved things What tool would you use to measure your pencil?

6. How to Use a Ruler Place the ruler next to the object Start at the 0 mark Look where the object ends on the ruler That number is the length Can you find the 5 cm mark on your ruler?

7. Measuring in Centimeters Use centimeters for small things Examples: pencil, book, toy car Always start at 0 on your ruler What small object can you measure?

8. Measuring in Meters Use meters for big things Examples: height of a door, length of a room Use a meter stick or measuring tape How many meters long do you think our classroom is?

9. Let's Practice: Measuring Small Objects Get your ruler ready Measure these items in centimeters: Your pencil Your eraser Your notebook Which one is the longest?

10. Comparing Lengths After measuring, we can compare Which is longer? Which is shorter? Example: A crayon is 8 cm, a marker is 12 cm The marker is longer than the crayon Can you find two things and compare their lengths?

11. Estimating Before Measuring Guessing the length before measuring is fun Look at an object and guess its length Then measure to see how close you were What do you think is about 10 cm long?

12. Measuring Curved Objects Some things aren't straight Use a measuring tape for curved things Follow the curve as you measure Can you think of something curved to measure?

13. Converting Centimeters to Meters Remember: 100 cm = 1 m If something is 150 cm, it's 1 m and 50 cm 200 cm is the same as 2 m How many meters is 300 cm?

14. Measuring Distance Distance is how far apart things are We often use meters for distance Example: Distance from your desk to the door How many steps do you think it is?

15. Fun with Measuring: Scavenger Hunt Find something that is: About 5 cm long Longer than 20 cm but shorter than 30 cm Almost 1 meter long What did you find?

16. Measuring Your Height Stand straight against a wall Have a friend mark where your head reaches Use a measuring tape from the floor to the mark How tall are you in centimeters?

17. Measuring in Real Life Measuring is used every day Cooking: measuring ingredients Building: measuring wood or fabric Sports: measuring race times or jump lengths Where else do you see measuring?

18. Making a Paper Meter Get 10 strips of paper, each 10 cm long Line them up end to end How long is your paper meter? Can you use it to measure something?

19. Review: Meters and Centimeters Meters (m) for big things Centimeters (cm) for small things 100 cm = 1 m Always start at 0 when measuring What's your favorite thing to measure?

20. You're a Measuring Expert! You've learned about meters and centimeters You know how to use different measuring tools You can compare lengths of objects Keep practicing your measuring skills! What will you measure next?

21. Why Do We Measure? Measuring helps us understand size We use measurements to make things fit Measurements help us compare objects Can you think of a time when you needed to measure something?

22. Measuring with Your Body Your body can be a measuring tool Use your foot to measure floor space Spread your arms for bigger measurements How many hand-spans wide is your desk?

23. Measuring Round Things Round objects need special measuring Use a string or measuring tape Wrap it around the object Then measure the string with a ruler What round object would you like to measure?

24. Making a Growth Chart Use a long piece of paper on a wall Mark your height with a pencil Write the date next to your mark Measure how tall you are in centimeters How often should you measure your height?

25. Measuring in Groups Work with a partner One person holds the ruler The other writes down measurements Switch roles and measure again Did you get the same measurements?

26. Measuring Games: Guess the Length Look at an object and guess its length Write down your guess in centimeters Measure the object How close was your guess? What helps you make better guesses?

27. Creating Art with Measurements Use a ruler to draw straight lines Make shapes with specific sizes Create a picture using only squares and rectangles Can you draw a house that's 10 cm tall?

28. Measuring in the Kitchen Cooking uses lots of measuring Measure ingredients with measuring cups Some recipes use centimeters for size Why is measuring important in cooking?

29. Measuring Plants Plants grow taller over time Use a ruler to measure plant height Start at the soil and measure to the top leaf How often should you measure a growing plant?

30. Measuring Water Water can be measured in milliliters (mL) 1 centimeter of water in a cup is about 10 mL Fill a tall, thin glass with water How many centimeters high is the water?

31. Measuring Time and Distance How far can you run in 10 seconds? Use a stopwatch to time yourself Measure the distance you ran in meters Can you run further next time?

32. Finding the Middle To find the middle, measure the whole length Divide that number by 2 That's where the middle is Can you find the middle of your pencil?

33. Measuring in Different Units Sometimes we use different units to measure In some countries, they use inches and feet 1 inch is about 2.5 centimeters Why do you think different units exist?

34. Making a Measuring Scrapbook Create a book of things you've measured Draw pictures of objects Write their lengths next to them What's the longest thing in your scrapbook?

35. Measuring Challenge: Build a Bridge Use popsicle sticks to build a bridge It must be 30 cm long Use only 20 sticks How will you measure as you build?

36. Measuring in Sports Many sports use measurements Long jump measures how far you can jump High jump measures how high you can jump What other sports use measuring?

37. Measuring Weather Weather uses special measurements Rain is measured in millimeters Wind speed is measured in kilometers per hour How would you measure snowfall?

38. Create Your Own Ruler Use a strip of paper and a real ruler Mark centimeters on your paper ruler Decorate it with colors or stickers What will you measure with your new ruler?

39. Measuring Masters: You Did It! You've learned so much about measuring You can measure big and small things You know how to use different tools Keep measuring and learning! What was your favorite part of learning about measuring?

40. Question 1 How many centimeters are in one meter? A) 10 B) 50 C) 100 D) 1000 Circle the correct answer.

41. Question 2 Which tool would you use to measure how tall you are? A) Ruler B) Measuring tape C) Pencil D) Eraser Circle the correct answer.

42. Question 3 About how wide is your fingernail? A) 1 meter B) 1 centimeter C) 10 meters D) 10 centimeters Circle the correct answer.

43. Question 4 A meter is about as tall as: A) A pencil B) A book C) A doorknob D) A car Circle the correct answer.

44. Question 5 Which tool would you use to measure a curved object? A) Ruler B) Meter stick C) Measuring tape D) Pencil Circle the correct answer.

45. Question 6 What should you do before measuring an object? A) Close your eyes B) Estimate its length C) Paint it D) Cut it in half Circle the correct answer.

46. Question 7 Which of these is closest to 1 meter long? A) A crayon B) A car C) A pencil D) A guitar Circle the correct answer.

47. Question 8 When using a ruler, where should you start measuring from? A) The 1 cm mark B) The 5 cm mark C) The 0 cm mark D) The end of the ruler Circle the correct answer.

48. Question 9 Which unit would you use to measure a small toy car? A) Meters B) Centimeters C) Kilometers D) Miles Circle the correct answer.

49. Question 10 If Sam is 120 cm tall and Alex is 1 meter tall, who is taller? A) Sam B) Alex C) They are the same height D) We can't tell Circle the correct answer.

50. Answer Key Question 1: C) 100 Question 2: B) Measuring tape Question 3: B) 1 centimeter Question 4: C) A doorknob Question 5: C) Measuring tape Question 6: B) Estimate its length Question 7: D) A guitar Question 8: C) The 0 cm mark Question 9: B) Centimeters Question 10: A) Sam