19.9+9.(37+43)+9
=19.9+9.80+9
=9.(19+80+1)
=9.100
=900
\(19\times9+9\times\left(37+43\right)+9\)
\(=19\times9+9\times80+9\times1\)
\(=9\times\left(80+19+1\right)\)
\(=9\times100\)
\(=900\)
\(19\times9+9\times\left(37+43\right)+9\)
\(=9\left[19+\left(37+43\right)+1\right]\)
\(=9\left[\left(19+1\right)+\left(37+43\right)\right]\)
\(=9\times100\)
\(=900\)
cái bn mà vừa nãy trả lời câu hỏi mik đồng ý kết bạn rồi nhé
