5又1/4*(3.5*3/16)
=21/4*(7/2*3/16)
=21/4*[(7/2-2.5)-(9/8-3/16)]
=21/4*[(7/2-5/2)-(18/16-3/16)]
=21/4*(1-15/16)
=21/4*1/16
=(21/4-2.5)-(9/8-1/16)
=(21/4-5/2)-(18/16-1/16)
=(21/4-10/4)-(18/16-1/16)
=11/4-17/16
=44/16-17/16
=27/16
=1+11/16
=1又1/16
5又1/4*(3.5*3/16)
=21/4*(7/2*3/16)
=21/4*[(7/2-2.5)-(9/8-3/16)]
=21/4*[(7/2-5/2)-(18/16-3/16)]
=21/4*(1-15/16)
=21/4*1/16
=(21/4-2.5)-(9/8-1/16)
=(21/4-5/2)-(18/16-1/16)
=(21/4-10/4)-(18/16-1/16)
=11/4-17/16
=44/16-17/16
=27/16
=1+11/16
=1又1/16