1
a=-2(-4+3)=-2×-1=2
b=5/6:1/3=5/6×3/1=5/2
a×b=2×5/2=5
a×b=5
4.
[tex] \frac{4^{7}*8^{-3}}{3*2^{3}+2^{3}}= \frac{2^{2*7}*2^{3*-3}}{2^{3}(3+1) } = \frac{ 2^{14-9}}{2^{3+2}} = \frac{2^{5}}{2^{5}} =1[/tex]
5. [tex] \frac{5^{5}+5}{5^{3} } - \frac{1}{5^{2}} = \frac{5^{5+1}-5}{5^{3}} = \frac{5^{5}}{ 5^{2} } = 5^{5-3}=5^{2}=25 [/tex]
11
[tex] \sqrt{0,04};0,23;0,(23);0,2(3); \frac{1}{4} [/tex]
