A)I1 3/4-1/6I=I7/4-1/6I=I(21-2)/12I=19/12B)I1 2/9-5/6I=I11/9-5/6I=I (22-15)/18I=7/18
C)5/6-I1 3/8I=5/6-11/8=(20-33)/24=-13/24
D)I1 3/4I-3/14=I7/4I-3/14=7/4-3/14=(49-6)/28=43/28
E)-I1 1/4-7/8I=-I5/4-7/8I=-I(10-7)/8I=-I3/8I=-3/8
F)(-3/16)-I1 1/6I=(-3/16)-I7/6I=-3/16-7/6=(-9-56)/48=-65/48
G)-I1 5/6I-(-4/21)=-I11/6I+4/21=-11/6+4/21=(-77+8)/42=-69/42=-23/14
H)(-7/16)-I1 1/6I=-7/16-7/6=(-21-56)/48=-77/48=
I)-I1 1/24I-(-5/9)=-25/24+5/9=(-75+40)/72=-35/72