A1/25
B-1/25
C-25
D25
Answer:
Related Questions:
1.06×7.8×0.639×2.12×0.03\frac {1.06 \times 7.8 \times 0.6 }{ 39 \times 2.12 \times 0.03} 39×2.12×0.031.06×7.8×0.6= ?
(221)2−(121)2=
