25×9又8分之7
=25*（10-1/8）
=25*10-25*1/8
=250-25/8
=246又7/8
76×75分之4
=（75+1）*4/75
=75*4/75+1*4/75
=4+4/75
=4又4/75
18分之17×26
=（1-1/18）*26
=1*26-26*1/18
=26-26/18
=24又5/9
5×19又3分之2
=5*（20-1/3）
=5*20-5*1/3
=100-5/3
=98又1/3
38×37分之6
=（37+1）*6/37
=37*6/37+1*6/37
=6+6/37
=6又6/37