Вычислите: 1)-5^2+(-2)^4;2)0.2*5^3-0.4:2^4;3)3^4-(2/5)^2*6 1/4;4)8*0.5+125*0.2^2

Question

Вычислите: 1)-5^2+(-2)^4;
2)0.2*5^3-0.4:2^4;
3)3^4-(2/5)^2*6 1/4;
4)8*0.5+125*0.2^2

Answer 1

1)  -25 +16 = -9
2)  B = 0,2·125 - 0,4/16 = 25- 1/40 = 25- 0,025 = 24,975
3)  C = 81 - (4/25)·(25/4) = 81 - 1 = 80 
4)  D= 4 + 125·0,04 = 4 + 5 = 9