to open up / to spread / sheet of paper / classifier for flat objects, sheet / classifier for votes
张
=
弓
+
长
:
Mnemonic symbol: a spreadsheet. James II of England (zh) practices his archery skills in front of the anglepod (ang1). Riding on a longboard (长) he shoots arrows using his composite bow (弓) trying to hit a spreadsheet (张).
三
=
一
+
二
:
Mnemonic symbol: Cartesian coordinate system with three (三) axes. Socrates (s-) is performing in front of the anthill (-an1). He created an electrical flute by attaching a large capacitor (二) to the flute (一), so that he can get the attention of all the people. Moreover, he's balancing on a Cartesian coordinate system (三). Unfortunately, only three (三) people stop to watch the performance.