Question

170.25 m of a particular type of cloth is avialable to make dresses. If each dress uses 9.89 m of cloth. Estimated number of dresses that can be made are

Answer 1

Total cloth availabe = 170.25 m

Cloth used in 1 dress = 9.89 m

$\text{Number dresses that can be made}=\frac{170.25}{9.89}$

Now to do the estimation we need to estimate 170.25 and 9.89 to nearest natural number.

For estimation to nearest natural number we look at tenths place and follow the estimation rule
Rule: If the digit is 5 or greater than 5 we round up, if the digit is less than 5 we round down.

170.25 has 2 at tenths place, it rounds down to 170
Similary,
9.89 has 8 at tenths place, it rounds up to 10

Estimated number of dresses $=\frac{170}{10}=17$

Hence the estimated number of dresses that can be made are 17.