math mnemonics

[mmm4444bot]

For the nine planets in order from the Sun:
. . Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Pluto. <<< Apparently, Soroban needs a new mnemonic. :wink:

 

[mmm4444bot]

Re:

For the decimal expansion of e: "we present a mnemonic to memorize a constant"

= 2.7182818.....

I've seen several mnemonics for e; I can't remember any of them. I can remember 2.7 .

After the 7, I usually think "The war of 1828! The war of 1828!" and then a "45-90-45" triangle.

(I'm the whack job around here. You don't need to remind me.)

 

[Denis]

Re:

For the nine planets in order from the Sun:
. . Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Pluto. <<< Apparently, Soroban needs a new mnemonic. :wink:

Up Uranus !

 

[Loren]

Is over of.

5 is what fraction of 20?

Answer >>>is/of >>> 5/20 = 1/4.

10 is 20% of what number?

Answer >>> is/of >>> 10/.20 = 50.