The freezing point is $\displaystyle-{{218}}^{\circ}+{{262}}^{\circ}\usepackage{cmbright}\Huge\$ . First, find the difference of the absolute values: $\displaystyle{{262}}^{\circ}-{{218}}^{\circ}={{44}}^{\circ}\usepackage{cmbright}\Huge\$ . Since the positive addend has the greater absolute value, the sum will be positive.