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Mathematics Goes to the Movies

by Burkard Polster and Marty Ross

**To Sir With Love (1967)**

From minute 13 on to the time when Mark decides to throw away the textbooks
we encounter some blackboards with maths on them.

2/7 +3/8 = 1/2 –1/16 = 3/8 x1/10 = 2x2-1/2

He asks some of the students to read aloud some passage from their textbook.
One reads a maths problem: If 14 hens lay an egg a day for 30 days how much
of the eggs (are dozen?) and how many have you to sell?

left side of previous blackboard visible here.

In a third scene he is actually trying to teach some arithmetic but never gets
around to doing anything.

Mark: Now, most of you girls help your mothers with the shopping (interruption)
About multiplying, there are a few valuable tricks to know … Say you are
offered roast beef at 10 shillings a pound (interruption, gives up) Do exercises
4, 5, and 6.

(1) Shopkeeper takes to the bank 8 (Pound sign) 1 notes, (Pound sign) 3 17s
61 in silver, 13/8 in copper. How much does he take altogether?

(2) A line which measures 7.2’’ is divided into 4 equal parts. How
long is each part?