Tag Archives: multiplication

Multiplication before addition?

There are ten people in the room.  How many eyes are there?  How many legs?  What about arms and legs combined?  Fingers?  Our older group didn’t have much trouble with this – they were pretty good at counting by 10’s to get to the answer.

It was next established that out of the 10 people, 7 are kids.  How many kids’ eyes are there?  In theory, this question shouldn’t be much harder than the previous ones, but all of a sudden some kids were trying to count the eyes by 1’s, others by 2’s, and both were making mistakes (probably because everyone was sitting in a circle and the adults are interspersed among the kids).  Finally, someone attempted to add 7+7, and after a mistake or two, the right answer was pronounced.

The actual goal of the lesson was to start informally introducing multiplication and division (for division, the kids worked in small groups and divided various amounts of glass beads amongst themselves).  And, on one hand, it is not necessary to be stellar at addition and subtraction to understand these ideas on a conceptual level.  However, in order to actually do many interesting things with the concepts, it helps when the kids are comfortable with counting at least by every number up to ten.  So does it make sense to introduce multiplication before the kids have mastered addition?

You could go either way on this one.  It turns out that mental math, even within the realm of 20, is a weakness across the board in our groups. And while doing addition drills isn’t exactly in line with our approach to making math fun, getting comfortable with mental math is a critical skill that will enable deeper exploration of many concepts (and will be really impressive to teachers and peers alike). And thus, we’re looking for ideas on how to get comfortable with addition and subtraction for 5-7 year olds in a fun way.  But it’s unclear that we should wait until they do indeed master this skill before introducing more complicated and interesting concepts.  Introducing notions like multiplication and division on a conceptual level may help them better understand the ideas behind these concepts instead of simply memorizing the times tables.  So for now, we’re putting up with counting on fingers and really entertaining mistakes.  Stay tuned for our progress.

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