By 10, by 9, by 5, by 3, and by chunks. This unit contains tricks for multiplication and for checking your work. A playful (and very useful) approach to multiplication. This unit is presented at three levels of varying complexity.
"Smith & Smith Ghost Eradication Services is a company that removes ghosts from haunted houses. If each haunted house has an average of three ghosts, how many ghosts can be removed in a month?" Five Halloween themed multiplication word problems.