Question

\(\frac{80\%x40\%x1,25x25+0,725+0,275}{1,25x32x25}\)
Tính nhanh nha mọi người. Em đang cần gấp, cảm ơn các bạn nhiều.

Answer 1

\(\frac{80\%\times40\%\times1,25\times25+0,725+0,275}{1,25\times32\times25}\)

\(=\frac{\frac{80}{100}\times\frac{40}{100}\times1,25\times25+1}{1,25\times32\times25}=\frac{\frac{32}{100}\times1,25\times25}{1,25\times32\times25}+\frac{1}{1,25x\times32\times25}\)

\(=\frac{32}{100}:32+\frac{1}{1,25\times32\times25}=\frac{1}{100}+\frac{1}{1000}=\frac{11}{1000}\)

Hok tốt

Answer 2

\(\frac{80\%\cdot40\%\cdot1,25\cdot25+0,725+0,275}{1,25\cdot32\cdot25}=\frac{0,8\cdot0,4\cdot1,25\cdot25+0,725+0,275}{1,25\cdot8\cdot4\cdot25}\)

\(=\frac{\left(0,8\cdot1,25\right)\cdot\left(0,4\cdot25\right)+1}{\left(1,25\cdot8\right)\cdot\left(4\cdot25\right)}=\frac{1\cdot10+1}{10\cdot100}=\frac{10+1}{1000}=\frac{11}{1000}\)