Question

[Lê Đăng Minh Quân]

 Tính nhanh:

13,45 x 65,5 + 14,45: 0,25 + 14,45 : 0,125 + 13,45 x 22,5

Answer 1

[Nguyễn Minh Quang]

ta có : 

\(13,45\times65,5+14,45:0,25+14,45:0,125+13,45\times22,5\)

\(=13,45\times65,5+13,45\times22,5+14,45\times4+14,45\times8\)

\(=13,45\times\left(65,5+22,5\right)+14,45\times\left(4+8\right)=13,45\times88+14,45\times12\)

\(=13,45\times88+13,45\times12+1\times12=1345+12=1357\)