1000000÷(670320+329980-300)=
1000000÷(670320+329980-300)= 1)670320+329980=1000300 2)1000300-300=1000000 3)1000000:1000000=1 1000000÷(670320+329980-300)=1
670320+329980=1000300-300=1000000 1000000:1000000=1