Question

At the beginning of the summer, the water level of a pond is 2 feet below its normal level. After an unusually dry summer, the water level of the pond dropped another 1 1/3 feet.

Write an equation to show how far above or below the normal water level the pond is at the end of the summer.

Answer 1

`-3(1)/(3)`

Explanation:

Since, after decreasing the water level by 2 feet,

Changes in water level = -2 feet,

Again after decreasing the water level by
`1(1)/(3)` feet,

Changes in water level =
`-1(1)/(3)` feet,

Thus, the total change in water level =
`-2-1(1)/(3)`

`=-2-1-(1)/(3)`

`=-3-(1)/(3)`

`=-(3+(1)/(3))`

`=-3(1)/(3)`

Which is the required expression.