$\displaystyle{1.8}\ \text{ kilograms}={1},{800}\ \text{ grams}\usepackage{cmbright}\Huge\$ and $\displaystyle{315}\ \text{ dekagrams}={3},{150}\ \text{ grams}\usepackage{cmbright}\Huge\$ , so the total weight of the apples and oranges was $\displaystyle{1},{800}+{3},{150}={4},{950}\ \text{ grams}\usepackage{cmbright}\Huge\$ . The weight of the bananas was $\displaystyle{4},{950}-{1},{350}={3},{600}\ \text{ grams}\usepackage{cmbright}\Huge\$ .