📏 Detailed Explanation of Measuring Using a Centimetre Ruler
When you want to measure how long or tall something is, you can use a centimetre ruler. A centimetre ruler helps you find the length of objects using centimetres, which are little units of measurement.
🔍 How to Measure Using a Centimetre Ruler
- Find the Start: Put the object you want to measure next to the ruler. Make sure one end of the object is right at the zero mark on the ruler. The zero mark is where the numbers start on the ruler.
- Look Carefully: Look at where the other end of the object stops on the ruler. This number tells you how many centimetres long the object is.
- Read the Number: The number beside the other end shows the length in centimetres (cm). For example, if the object ends at number 7, it is 7 centimetres long.
✏️ Example of Measuring a Pencil
If you have a pencil and you put it along the centimetre ruler, with the start of the pencil at zero, and the pencil’s tip ends at number 12, then the pencil is 12 centimetres long.
💡 Tips for Measuring in Centimetres
- Always start measuring from zero on the ruler to get the correct length.
- Make sure the ruler and the object are straight and flat so you get an accurate measurement.
- Don’t guess between the centimetre marks; count the full centimetres for now.
- Practice measuring different small objects like toys, books, or crayons to get better!
Remember, measuring with a centimetre ruler helps you learn how big or small things are. Keep practicing, and soon you will be a measuring expert! 🎉
📝 20 Examination-Style Questions with Answers on Measuring Using a Centimetre Ruler
Here are 20 different examination-style questions for Year 2 students to practise measuring using a centimetre ruler. These questions cover reading scales, comparing lengths, and tying measurement to real objects using centimetres (cm).
📚 Questions
- Look at the ruler below. What is the length of the pencil in centimetres?
Answer: 7 cm - The toy car is 12 cm long. How many centimetres longer is the toy car than a pencil that is 9 cm long?
Answer: 3 cm longer - Measure the line on your paper. It is 15 cm long. How many more centimetres do you need to add to make it 20 cm?
Answer: 5 cm - Which is longer: a book that measures 18 cm or a tablet that measures 20 cm?
Answer: The tablet is longer. - A ribbon is 25 cm long. If you cut it into two pieces, one is 10 cm long. How long is the other piece?
Answer: 15 cm - Using a ruler, measure your hand’s length in centimetres. Write down the measurement.
Answer: (Student’s own measurement, e.g. 14 cm) - If a string is 30 cm long, what is its length in metres? (Remember, 100 cm = 1 metre)
Answer: 0.3 metres - Which object is longer, a pencil measuring 9 cm or an eraser measuring 5 cm?
Answer: The pencil - Draw a line that is exactly 8 cm long using your centimetre ruler.
Answer: (Check that the student draws an 8 cm line) - A table is 120 cm long. Write the length in metres and centimetres.
Answer: 1 metre and 20 centimetres - The length of a crayon is 7 cm. The length of a marker is 11 cm. How much longer is the marker?
Answer: 4 cm - Measure the width of your school book using a ruler. What is the measurement?
Answer: (Student’s own measurement) - If two sticks are 13 cm and 16 cm long, what is the difference in their lengths?
Answer: 3 cm - Tom’s toy robot is 22 cm long. Sarah’s toy robot is 19 cm long. Who has the longer toy robot and by how much?
Answer: Tom’s robot is 3 cm longer. - The length of a table is 100 cm. The chair next to it is 70 cm tall. Which object is taller?
Answer: The table is longer (or taller, if considering height). - You have a rope that is 45 cm long. If you cut off 20 cm, how much is left?
Answer: 25 cm - Measure a pen’s length using a centimetre ruler. Tell your answer in full centimetres (don’t count millimetres).
Answer: (Student’s own answer, e.g., 14 cm) - Which is longer: a pencil measuring 10 cm or two pencils measuring 6 cm and 5 cm put together?
Answer: Two pencils measuring 11 cm together are longer. - A book is 24 cm long. If you want to measure half of it, what length should you look for on the ruler?
Answer: 12 cm - You measure your lunchbox and it is 23 cm long. How many centimetres longer is it than a 15 cm sandwich box?
Answer: 8 cm
These questions help Year 2 students practise measuring length using a centimetre ruler in different ways. Encourage them to use their rulers carefully, read the scale correctly, and think about comparing and adding lengths. 📐
