\(\text{300+300+200+400+600.2=2400}\)
\(300+300+200+400+1200\)
\(=600+600+1200\)
\(=1200+1200\)
\(=2400\)
300+300+200+400+600*2
=300+300+200+400+1200
=600+600+1200
=1200+1200
=2400
\(300+300+200+400+1200\)
\(\Rightarrow=600+600+1200\)
\(\Rightarrow=1200+1200\)
\(\Rightarrow=2400\)
Chúc bạn học tốt!
Tổng trên bằng:
300+300+200+400+600x2
=300+300+200+400+1200
=600+600+1200
=1200+1200
=2400
300 + 300 + 200 + 400 + 600 x 2
= 600 + 600 + 1200
= 1200 + 1200
= 2400 .
300+300+200+400+600x2
=300+300+200+400+1200
=600+600+1200
=1200+1200
=2400 nha 
