А). √2 * (√64\√8) = √2 * √(64\8) = √2 * √8 = √2 * √(4*2) = √2 * 2√2 = 2(√2*<span>√2)=2*2=4
</span>б1).√3\4 * √9\16 = (3<span>√3) \ 64</span>
б2). √3\4 * √9\16 = √(3\16) * √(9\256) = √ ((3\16)*(9\256)) = √(27\4096) = √27\√4096 = √27\64 = √(3*9) \ 64 = (3√3)\64
18;27;36;45;54;63;72;81;90
6 2/3÷2 7/9 = 20/3 ÷ 25/9 = 20/3 × 9/25 = (20×9)/(3×25) = (4×3)/5 = 12/5 = 2 целых 2/5 = 2,4
А) = -1/2 - 7/10 + 3/5 - 11/20 = - 10/20 - 14/20 + 12/20 - 11/20 = 12/20 - (10/20 + 14/20 + 11/20) = 12/20 - 35/20 = - 23/20 = - 1 3/20
6018м-524м+18808м=24302м или 24 км 302м
137м+823м-565м=395м или 6 ч 35м