0.625 X 1又四分之一 + 8分之3 X 1.75
=5/8 X 5/4 + 3/8 X 7/4
=(1-3/8) X 5/4 + 3/8 X 7/4
=5/4 - 3/8 X 5/4 + 3/8 X 7/4
=5/4 + (7/4 - 5/4) X 3/8
=5/4 + 1/2 X 3/8
=20/16 + 3/16
=23/16
0.625 X 1又四分之一 + 8分之3 X 1.75
=5/8 X 5/4 + 3/8 X 7/4
=(1-3/8) X 5/4 + 3/8 X 7/4
=5/4 - 3/8 X 5/4 + 3/8 X 7/4
=5/4 + (7/4 - 5/4) X 3/8
=5/4 + 1/2 X 3/8
=20/16 + 3/16
=23/16