[9²-2⁴•5⁹:(5⁴)²]:2²
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Răspuns:

[tex]( {9}^{2} - {2}^{4} \times {5}^{9} \div {( {5}^{4}) }^{2} ) \div {2}^{2 } = \\ (81 - {2}^{4} \times {5}^{9} \div {5}^{8} ) \div {2}^{2} = \\ (81 - 16 \times {5}^{1} ) \div 4 = \\ (81 - 16 \times 5) \div 4 = \\ (81 - 80) \div 4 = \\ 1 \div 4 = \frac{1}{4} = 0.25[/tex]

Răspuns:

[9²-2⁴×5⁹: (5⁴)²]:2²​

=(81-16·5⁹:5⁴ˣ²):4

=(81-16·5⁹⁻⁸):4

=(81-16·5):4

=(81-80):4=1:4

=0,25