Question

Karin observed that the water level in the part of the river she observed fell 1.68 millimeters per year for 1.5 years. Use the distributive property to calculate the exact variation in water level for the time period

Answer 1

In order to use the distributive property I first get the amount of the water fell in ;

One year

1.68mm

A half a year

½× 1.68mm

= 0.84mm

One and a half years (Using the distributive property)

1.68mm + 0.84mm

168mm + 84mm

100. 100

(168÷100) + (84÷100)

(168+84) ÷ 100

252 ÷ 100

252

100

= 2.52mm

Therefore the variation in the water level in the time period was 2.25mm