Question

Tính nhanh :

 

 

\(\frac{327x412+400}{328x412-12}\)

Answer 1

học lâu giờ quên rùi

Answer 2

\(\frac{327.412+400}{328.412-12}=\frac{327.412+400}{\left(327+1\right).412-12}=\frac{327.412+400}{327.412+412-12}=\frac{327.412+400}{327.412+400}=1\)

Answer 3

327x412+400 : [327+1]x412-12

[327+1]x412-12=327x412+400

suy ra [327x412+400] :[327x412+400]=1

nha