A10
B100
C1
D1000
Answer:
Related Questions:
15+152+153+154=?\frac15+\frac1{5^2}+\frac1{5^3}+\frac1{5^4}=?51+521+531+541=?
90.9×90.9\frac9{0.9}\times\frac9{0.9}0.99×0.99
