Question

201×245-45脱式计算简便计算

201×245-45脱式计算简便计算

Answer 1

=（200+1）*245-45
=200*245+245-45
=49000+200
=49200

Answer 2

201×245-45
=（200+1）×245-45
=200×245+245-45
=49000+200
=49200