Răspuns:
[tex]a)129 {cm}^{2} + 15 {cm}^{2} =144 {cm}^{2} [/tex]
[tex]c)1.15 {km}^{2} + 2.35 {km}^{2} = 3.5 {km}^{2} [/tex]
[tex]e)5.7ha + 120 {hm}^{2} = \\ = 57000 {hm}^{2} + 120 {hm}^{2} = 57120 {hm}^{2} [/tex]
[tex]b)232 {m}^{2} + 188 {m}^{2} = 420 {m}^{2} [/tex]
[tex]d)1ar + 200 {dam}^{2} = 201 {dam}^{2} [/tex]
[tex]f)5(12.34 {m}^{2} + 17.66 {m}^{2}) = 5(30 {m}^{2}) = 150 {m}^{2} [/tex]