Twenty times three is sixty in mathematical terms.
A = 60
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x+3 = 20 x = 20-3 x = 17
20 cubed cubed = [203]3 = (20 x 20 x 20)3 This equals 20 x 20 x 20 x 20 x 20 x 20 x 20 x 20 x 20 which = (20)9 The rule to work it out is:multiply the two exponents ie 3 x 3 = 9 206 is 20 x 20 x 20 x 20 x 20 x 20 which is obviously less than 209. See: http://oakroadsystems.com/math/expolaws.htm#WhatsNew#WhatsNew
3 * 21 = 3*(20 + 1) = 3*20 + 3*1 = 60 + 3 = 63.
20/30 = (2 x 10)/(3 x 10) = 2/3
3/20 = 3/5 x 1/4 0.25 x 3/5 = 3 x 0.05 = 0.15 = 15/100 = 3/20