Addition using standard units (litre and ml)
4th Maths : Term 3 Unit 3 : Measurements
To add litre and ml, first convert the litre into ml.
EXAMPLE 1
Add: \(1\,l + 345\,ml\)
\(1\,l + 345\,ml\)
\(= (1 \times 1000\,ml) + 345\,ml\)
\(= 1000\,ml + 345\,ml\)
\(= 1345\,ml\)
Note: 1000 \(ml\) = 1 litre
EXAMPLE 2
Add: \(7\,l + 9\,ml\)
\(7\,l + 9\,ml\)
\(= (7 \times 1000\,ml) + 9\,ml\)
\(= 7000\,ml + 9\,ml\)
\(= 7009\,ml\).
EXAMPLE 3
Add: \(63\,l\; 380\,ml\) and \(14\,l\; 175\,ml\)
Step 1:
Start from millilitres.
\(380\,ml + 175\,ml = 555\,ml\)
Step 2:
Then add litres. \(63\,l + 14\,l = 77\,l\)