Verified answer

1) 0,2*60+1/2*4=12+=12

2)0,2*64=121,8

3)5²*49=25*49=1225

4)√(2*50)-81=√100-81=10-81=-71

Объяснение:

[tex]1)0.2 \sqrt{3600} + \frac{1}{2} \sqrt{16} = 0.2 \times 60 + \frac{1}{2} \times 4 = 12 + 2 = 14[/tex]

[tex] \sqrt{0.04} \times 64 = \sqrt{ \frac{1}{25} } \times 64 = \frac{1}{5} \times 64 = \frac{64}{5} = 12.8[/tex]

[tex] \sqrt{5 {}^{4} } \times 7 {}^{2} = 5 {}^{2} \times 7 {}^{2} = 35 {}^{2} = 1225[/tex]

[tex] \sqrt{2} \times \sqrt{50} - \frac{243}{3} = \sqrt{100} - \frac{243}{3} = 10 - 81 = - 71[/tex]