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Saying something is 9 times bigger is also a shorthand because “times” is a shorthand for repeated addition. You are adding a number “9 times” to make it “9 tim
by dools 8d ago
Saying something is 9 times bigger is also a shorthand because “times” is a shorthand for repeated addition. You are adding a number “9 times” to make it “9 times larger”. But we don’t say the “adding” part.
Likewise if I repeatedly subtract a number 9 times to make it “9 times smaller” I can omit the subtracted bit.
- simondotau 8d agoThat interpretation doesn’t make sense. Repeated subtraction does not correspond to division in the way repeated addition corresponds to multiplication.
- dools 8d agoQue? Division is the opposite of multiplication of course it does. If you divide 81 by 9 you subtract 9 from 81 until you get to 0. The number of TIMES you do that is the result “81 divided by 9”.
- simondotau 8d agoThis isn’t analogous to repeated addition giving multiplication. You’ve switched from applying an operation nine times to counting how many times an operation can be applied. You chose 81 because it’s the one number that makes your argument appear to work. Try the same reasoning with 80 ÷ 9.
- dools 7d ago[dead]