When the crisp-and-crude method of calculation, which yields an approximate instead of an exact answer to a problem, is done on a mask rather than on an envelope or a napkin.
With billions of people wearing a face mask to shield themselves against the coronavirus, the back-of-the-mask thinking is a lifelong guesstimation skill math teachers and tutors worldwide ought to promote to students during this pandemic crisis.
by MathPlus September 20, 2020
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Back-of-the-Mask Thinking • back of the bus • Back of the Face • Back of the Net • `'`Back`'`Of`'`The`'~Bus`'`Are`'`The`'`Sunflower`'~Dead`'` • `'`Back`'`Of`'`The`'~Bus`'`Are`'`The`'`Sunflower`'~Deed`'` • `'`Back`'`Of`'`The`'~Bus`'`Is`'`The`'`Sunflower`'~Dead`'` • Back of the barrel • Back-Of-The-Booking • back-of-the-box review