Wyatt has 10 blue envelopes. He has 4 fewer yellow envelopes than blue envelopes. How many envelopes does Wyatt have in all?
Wyatt has 10 - 4 = <T>subtract(10, 4)=6 yellow envelopes.
The total number of envelopes he has is 10 blue + 6 yellow = <T>add(10, 6)=16 envelopes.
