4 Chords with an added 7

A "chord with an added 7" adds the 7th note that you count up from the named note. For example, in the key of C, G7 is G-B-D-F. To make it easier to play and to not have the high piercing note up at the top, move your RH thumb down one note and play F-B-D. The G moves down into to the LH. *Warning: A tricky thing about the 7th chord is that you have to use the same accidentals as the key you're in. If you're in the key of G, any F will be an F#. So a G7 would be F#-B-D in the RH. In the key of D, D7 would be C#-F#-A in the RH. If this feels complicated, just try both and see which sounds right!