Questions tagged [multiplication]

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6 votes
11 answers
1k views

How to explain to a ~$12-16$ year-old student who is weak at maths, that $\ 38 \times 27 \times 14 = 27 \times 14 \times 38$?

How to explain to a ~$12-16$ year-old student who is weak at maths, that $\ 38 \times 27 \times 14 = 27 \times 14 \times 38,\ $ and that $\ 3.4 \times 10^{-6} \times 2.1 \times 10^{-5} = 3.4\times 2.1 ...
13 votes
9 answers
1k views

Is it meaningful to add a number to itself a fractional number of times?

(Migrated from the math stack exchange, where I received an apt-seeming suggestion to pose the question here, at the math-educators stack exchange) I introduce my young kids to basic math concepts in ...