Lazy Lemur Multiplication keeps students aware and focussed as they use the standard multiplication algorithm. Too often I was seeing students just blindly jumping into an algorithm and then letting their mind wander. Sloppy work was the result. Lazy Lemur Multiplication keeps students on their toes as they must stop the standard algorithm midway-through if they see an unwanted digit.
Standards for Mathematical Practice:
All MathPickle puzzles including Lazy Lemur Multiplication are guaranteed to engage a wide spectrum of student abilities while targeting the following Standards for Mathematical Practice:
MP1 Toughen up!
This is problem solving where our students develop grit and resiliency in the face of nasty, thorny problems. It is the most sought after skill for our students.
MP3 Work together!
This is collaborative problem solving in which students discuss their strategies to solve a problem and identify missteps in a failed solution. MathPickle recommends pairing up students for all its puzzles.
MP6 Be precise!
This is where our students learn to communicate using precise terminology. MathPickle encourages students not only to use the precise terms of others, but to invent and rigorously define their own terms.
MP7 Be observant!
One of the things that the human brain does very well is identify pattern. We sometimes do this too well and identify patterns that don't really exist.
Common Core State Standards:
Lazy Lemur Multiplication targets the following grade 4/5 Common Core State Standards:
Multiply a whole number of up to four digits by a one-digit whole number.
Fluently multiply multi-digit whole numbers using the standard algorithm.