Question

728*359-628*359+641*1000

Answer 1

728*359-628*359+641*1000=359*(728-628)+641*1000=359*100+641000=35900+641000=676900

Answer 2

1) 728*359=261352

2) 628*359=225452

3) 641*1000=641000

4) 261352-225452=35900

5) 35900+641000=676900