\(42\times43+43\times57+43-360\div4\)
\(=43\left(42+57+1\right)-90\)
\(=43.100-90=4300-90\)
\(=4210\)
\(42\times43+43\times57+43-360:4\)
\(=43\times\left(42+57+1\right)-90\)
\(=43\times100-90\)
\(=4300-90\)
\(=4210\)
Học tốt
42×43+43×57+43-360:4
=42×43+43×57+43-90
=43×(42+57+1)-90
=43×100-90
=4300-90
=4210
Bài làm :
Ta có :
\(42\times43+43\times57+43-360\div4\)
\(=43\left(42+57+1\right)-90\)
\(=43.100-90\)
\(=4300-90\)
\(=4210\)
