hector music teacher requires 450 min of practice each month. Hector practiced 239 min the first three weeks this month. Estimate how many minutes he has left to practice.
math - Ms. Sue, Thursday, October 27, 2011 at 4:43pm
450 - 240 =
math - sandra, Thursday, October 27, 2011 at 4:54pm
math - Ms. Sue, Thursday, October 27, 2011 at 5:01pm
math - Anonymous, Tuesday, January 3, 2012 at 5:26pm
So Hector needs to practice for 210 minutes or 3 hours and 30 minutes to be exact