Measurement of Length Mass and Volume-Mathematics STD 4
Length is the distance between two points. The standard unit of length is metre (m) Other units of length are:
- Kilometres (km).
- Hectometre (hk)
- Decametre (dam)
- Decimetre (dm)
- Centimetre (cm)
- Millimetre (mm)
Comparison of units of length:
Look at the table below showing the comparison of units of length.
To remember the arrangement of units in the table above Use the following sentences
KING HENRY DAUĞHTER MUST DRINK COLD MILK
(k)
(h)
(d)
(m)
(d)
(c)
(m)
From the table above 1km = 1,000m
Im = 100cm 1cm = 10mm
I. Changing metres (m) into centimetres (cm)
Changing centimetres (cm) into metres (m)
Changing centimetres (cm) into metres and centimetres
EXERCISE
1. Change the following into centirnetres
3m
9m
10m – 2m
15m + 18m + 2m
2. Change the following into metres
100cm
(700 – 500)cm
(500 x 6)cm
900cm
(80 x 40)cm
1500cm
300cm
100cm
(7+13 + 80 + 100 + 200)cm
(600 – 4500)cm
3. Change the following into centimetres and metres.
125cm
175cm
508cm
970cm
475cm
(20 + 50 + 200)cm
(380 + 70)cm
192cm
271 cm
(250-4) cm
Changing centimetre into millimetres
EXERCISE
Change the following into millimetres (mm)
| 1. | 60cm |
| 2. | 54cm |
| 3. | 3. 305cm |
| 4. | 45em |
| 5. | 120cm |
| 6. | 8cm |
| 7. | 95cm |
| 8. | 26cm |
| 9. | 350cm |
| 1) | 10.10cm |
Changing kilometres (km) into metres (m)
Note: 1km = 1000m
EXERCISE
Change the following into metres (m)
| 1. | 16km |
| 1. | 2.4km 206m |
| 2. | 5 km, |
| 3. | 38km |
| 4. | 5.23km |
| 5. | 30km |
6. 109km
7. 8km 54m
8. 99km 100m
9. 3km 509m
Changing metres (m) into kilometres (km) Examples
Change into km or km and m
- 8, 000m
- 7,530m
- 12,008m
- 1,803m
- 5,673m
- 9,500m
- 7,000m
- 10,005m
- 15,000m
- 9,003m
Self evaluation
- 1km is equal to cm
- The standard unit of length is
- Use your ruler to measure the length of your mathematics textbook
- List down two (2) tools used to measure length
- 1,000mm is equal to metres
- Change 3,000cm into dam
- hm stands for
- I dm is equal to
- 1cm is equal to mm
- 1km is equal to mm
MEASUREMENT OF MASS AND VOLUME
MASS
The commonly units of mass are kilogram and grams Other units of mass are:
- Tonne (t)
- Hectogram (hg)
- Decagram (dag)
- Decigram (dg)
- Centigram (cg)
- Milligram (mg)
Comparison of the units of mass
Exercise
changing grams (g) into kilogram (kg) and grams (g)
EXERCISE;
Change into kg and g.
EXAMPLES










































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