2. Ana bought a dress and shoes whose prices in kuna are natural numbers. She rounded both prices to the nearest tens and said she spent $240 \mathrm{kn}$ on the dress and $310 \mathrm{kn}$ on the shoes.

a) What is the smallest amount of money that Ana could have spent on buying the dress and shoes?

b) Can Ana buy a chocolate bar for 16 kuna with the difference between the largest and smallest amount of money she could have spent on buying the dress and shoes?
2. The lowest possible price of a dress is $235 \mathrm{kn}$, and the lowest price of shoes is $305 \mathrm{kn}$.

1 POINT

The smallest amount Ana could have spent on buying a dress and shoes is

$235 \mathrm{kn} + 305 \mathrm{kn} = 540 \mathrm{kn}$.

1 POINT

The highest possible price of a dress is $244 \mathrm{kn}$, and the highest price of shoes is $314 \mathrm{kn}$.

1 POINT

The largest amount Ana could have spent on buying a dress and shoes is

$244 \mathrm{kn} + 314 \mathrm{kn} = 558 \mathrm{kn}$.

1 POINT

The difference is $558 \mathrm{kn} - 540 \mathrm{kn} = 18 \mathrm{kn}$.

1 POINT

Since 18 > 16, Ana can buy chocolate.

1 POINT

TOTAL 6 POINTS