Does it bother anyone when curricula on core subjects don't match...?

...and nobody teaches to fill the gap? I subbed a middle school recently, and while the science classes expected students to handle decimals in density calculations, they had not been taught how to do decimals in multiplication and division. Sad to say, it's not just local, but statewide curricula which do this, and nobody goes back to teach them what they missed...nobody has the time, when so much other material must be jammed into young brains.