a) 4/5×(7/2+1/4)^2
b). 5^4×20^4/25^5×4^5
Tính nhanh:A=1*5*6+2*10*12+3*15*18+4*20*24+5*25*30/1*3*5+2*6*10+3*9*15+4*12*20+5*15*25
54.204/255.45
54. 204/255. 45
5^4 * 20^4/25^5*4^5
54.204 phần 255.45
Tính
5^4×20^4\25^5×45
\(\dfrac{8^{20}+4^{20}}{4^{25}+64^5}\)
tính:
54.204/255.45