Lesson · Grade 2 · Mathematics
Measuring Length in Centimetres
- Grade 2
- Mathematics
- 1 min 1 s
- British Columbia
- BC2-MA-16
A pencil measures 4 small paper clips but only 2 big ones, which shows that clips give different answers because they are different sizes. A ruler fixes this: the end of the pencil lines up with 0, and counting the same-size centimetre spaces one at a time shows the pencil is 10 centimetres long.
Anyone can watch two lessons on the website without an account. Signing in is free, no payment and no card, and opens three a day; Plus has no limit.
Loading
In one sentence
The question this lesson answers
How long is this pencil?
Let's measure it with small paper clips.
Transcript
What the lesson says
How long is this pencil?
Let's measure it with small paper clips.
One, two, three, four. Four clips long.
Now let's measure with big paper clips.
One, two. Now it is only two clips long.
Same pencil, but two different answers!
The paper clips are not the same size.
This ruler measures in centimetres.
Each space is one centimetre, all the same size.
Start at zero. Line up the end of the pencil.
Count the spaces: one, two, three, four, five, six, seven, eight, nine, ten.
The pencil is ten centimetres long.
Start at zero, then count the centimetres.
Curriculum
Where this fits
- British Columbia, Grade 2
Mathematics, Geometry and measurement: direct linear measurement, introducing standard metric unitsBC2-MA-16
The outcomes and strands follow the British Columbia curriculum.
Keep going
1 min 12 s3:15 p.m. or 15:15? Morning, afternoon and the 24-hour clock
Grade 4 · 1 min 12 s
1 min 26 s3D Objects: Faces, Edges and Vertices
Grade 3 · 1 min 26 s
1 min 21 sArea and Perimeter: What Is the Difference?
Grade 5 · 1 min 21 s
1 min 5 sArea of a Circle from the Radius or the Diameter
Grade 7 · 1 min 5 s
1 min 14 sArea of a Parallelogram: Cut and Slide into a Rectangle
Grade 6 · 1 min 14 s
1 min 18 sArea of a Rectangle: Count the Squares, Then Multiply
Grade 5 · 1 min 18 s
1 min 16 sArea of a Trapezoid: Two Copies Make a Parallelogram
Grade 6 · 1 min 16 s
1 min 19 sArea of a Triangle: Half of a Parallelogram
Grade 6 · 1 min 19 s
- All Grade 2 Mathematics lessons
- Teachers: the maths worksheets for Grade 2 are in the dashboard, each with a worked example and a proven answer key.
- Try the graph paper, free for everyone, no account needed.
- Create a free account to watch three lessons a day, no payment and no card.