=842-(300 5)
=842-300-5
=542-5
=537
385-174-26
=385-(174 26)
=385-200
=185
201×26
=(200 1)×26
=200×26 1×26
=520 26
=546
45×98
=45×(100-2)
=45×100-45×2
=4500-90
=4410
=842-(300 5)
=842-300-5
=542-5
=537
385-174-26
=385-(174 26)
=385-200
=185
201×26
=(200 1)×26
=200×26 1×26
=520 26
=546
45×98
=45×(100-2)
=45×100-45×2
=4500-90
=4410