Olá!
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[tex]{ \large \displaystyle \sf {a) \: \sqrt{81} - \sqrt{100} + \sqrt{64} }}[/tex]
[tex]{ \large \displaystyle \sf { \sqrt{9 {}^{2} } - \sqrt{10 {}^{2} } + \sqrt{8 {}^{2} } }}[/tex]
[tex]{ \large \displaystyle \sf { 9 - 10 + 8 }}[/tex]
[tex]{ \large \displaystyle \sf { 17 - 10}}[/tex]
[tex]{ \green{ \boxed{ \boxed{ \pink{{ \large \displaystyle \sf { \: \: 7 \: \: }}}}}}} \\ \\ \\ [/tex]
[tex]{ \large \displaystyle \sf {b) - \sqrt{36} - \sqrt{121} + \sqrt{64} }}[/tex]
[tex]{ \large \displaystyle \sf {- \sqrt{6 {}^{2} } - \sqrt{11 {}^{2} } + \sqrt{8 {}^{2} } }}[/tex]
[tex]{ \large \displaystyle \sf { - 6 - 11 + 8 }}[/tex]
[tex]{ \large \displaystyle \sf { - 17 + 8}}[/tex]
[tex]{ \green{ \boxed{ \boxed{ \pink{{ \large \displaystyle \sf { \: - 9 \: \: }}}}}}} \\ \\ \\ [/tex]
[tex]{ \large \displaystyle \sf {c) \: \sqrt{1} + \sqrt{4} + \sqrt{9} + \sqrt{16} + \sqrt{49} + \sqrt{64} }}[/tex]
[tex]{ \large \displaystyle \sf { \sqrt{1 {}^{2} } + \sqrt{2 {}^{2} } + \sqrt{3 {}^{2} } + \sqrt{4 {}^{2} } + \sqrt{7 {}^{2} } + \sqrt{8 {}^{2} } }}[/tex]
[tex]{ \large \displaystyle \sf { 1 + 2 + 3 + 4 + 7 + 8 }}[/tex]
[tex]{ \large \displaystyle \sf { 3 + 3 + 4 + 7 + 8}}[/tex]
[tex]{ \large \displaystyle \sf { 6 + 4 + 7 + 8}}[/tex]
[tex]{ \large \displaystyle \sf { 10 + 7 + 8}}[/tex]
[tex]{ \large \displaystyle \sf { 17 + 8}}[/tex]
[tex]{ \green{ \boxed{ \boxed{ \pink{{ \large \displaystyle \sf { \: \: 25\: \: }}}}}}} \\ \\[/tex]
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Espero ter ajudado! ❤️
