Mathematics
Measurement and time
Length
Educator section
Memorandum
1. Length of your desk = cm
Your own height = cm / m
Width of the class = m
Thickness of your writing pad = mm
Length of your pencil = cm / mm
2. km
- 1 000
- 1 000
- 100
- 10
Leaner section
Content
Activity: to estimate, measure and record 2-dimensional shapes and 3-dimensional objects [lo 4.4.3]
To use appropriate measuring instruments [lo 4.6.3]
From the work that was completed in Grades 4 and 5, you know that we always measure in units.
1. Take a good look at the following and then complete the table:
- Indicate which units you will use.
- Estimate the length.
- Then measure the true length.
| Unit | Estimate | Actual length | |
| Length of your desk | ______________ | ______________ | ______________ |
| Your own height | ______________ | ______________ | ______________ |
| Width of the class | ______________ | ______________ | ______________ |
| Thickness of your writing pad | ______________ | ______________ | ______________ |
| Length of your pencil | ______________ | ______________ | ______________ |
2. In what unit would you measure the distance between your home and the school?
_____________________________________________________________________
3. Let us test your memory! See whether you are able to answer the following questions:
3.1 How many metres are there in 1 kilometre?____________________________
3.2 How many millimetres are there in 1 metre? ___________________________
3.3 How many centimetres are there in 1 metre? ___________________________
3.4 How many millimetres are there in 1 centimetre? _______________________
DO YOU REMEMBER THIS?
You should know it, but let us look at it again:
km m cm mm
Assessment
Learning Outcome 4: The learner will be able to use appropriate measuring units, instruments and formulae in a variety of contexts.
Assessment Standard 4.5: We know this when the learner estimates, measures, records, compares and orders two-dimensional shapes and three-dimensional objects using S.I. units with appropriate precision for:
4.4.3: length using millimetres (mm), centimetres (cm), metres (m) and kilometres (km);
Assessment Standard 4.6: We know this when the learner re uses appropriate measuring instruments (with understanding of their limitations) to appropriate levels of precision including:
4.6.3: rulers, metre sticks, tape measures and trundle wheels to measure length.