Mathematical formulas are important components in teaching and learning mathematics. These formulas provide a computation roadmap. In order to assist both teachers and learners, this note provides general mathematical formula and common units of measurements meant for classes 7 and 8. The formulas are expected to help students to solve questions easily and in a more effective way.
Length
The units of length that are used include the following:
- millimetre (mm)
- centimetre (cm)
- decimetre (dm)
- Metre (m)
- Dekametre (Dm)
- Hectometre (Hm)
- Kilometre (Km)
Mass
- 1000 g = 1Kg
- 1000 Kg = 1Tonne
- 1000000 g = 1Tonne
Volume and Capacity
- 1 cm3 = 1 Ml (millilitre)
- 1000 cm3 = 1 L (litre)
- 100 cm3 = 1 dl (decilitre)
- 1 m3 = 1000 litre
- 1000000 cm3 = 1 m3
- 10 dl = 1 Litre
- 1000ml = 1 Litre
Time
- 60 Seconds = 1 Minute
- 60 Minutes = 1Hour
- 3600 Seconds = 1 Hour
- 24 Hours = 1 day
- 7 Days = 1 Week
Area
a) Rectangle
Area = Length x Width
A = L X W
b) Square
Area = Side x Side
A = S x S
A = S2
c) Parallelogram
A = base x Height
A = b x h
d) Rhombus
Area = base x height
A = b x h
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