Question

Practice Time
Amina's water bottle holds one litre of water. She drank 250 mL of water and her friend Govind drank 150 mL. How much water is left in her bottle?

Answer 1

Capacity of Amina's water bottle = 1 L

1 L = 1000 mL

So, Amina's water bottle holds 1000 mL of water.
Quantity of water drunk by Amina = 250 mL
Quantity of water drunk by Govind = 150 mL
Quantity of water drunk by both = 250 + 150 mL
= 400 mL

Working: $\begin{array}{cccc}& 2& 5& 0\\ +& 1& 5& 0\\ & 4& 0& 0\\ & & & \end{array}$
Quantity of water left in the bottle = 1000 mL − 400 mL
= 600 mL
Working: $\begin{array}{ccccc}& 1& 0& 0& 0\\ -& 0& 4& 0& 0\\ & & 6& 0& 0\\ & & & & \end{array}$
Thus, 600 mL of water is left in Amina's bottle.