These are some good examples that might help us in understanding those words:-
a -He put on his slippers and went to the shop
-He put on his sandals and went to the shop
b-My son asked me for some shillings to buy a Malay newspaper
-My son asked me for some change/small change to buy a Malay newspaper.
-Most vending machine do not accept notes. They accept only coins.
Decide whether the words slippers, sandals, shillings, change/small change and coins used in the sentences above have been used correctly or not.
p/s: those sentences have nothing to do with any slang