=13/7*3/8+1/7*3/8
=(13/7+1/7)*3/8
=2*3/8
=3/4
=1/4*32+1/4+67*1/4
=1/4*(32+1+67)
=1/4*100
=25
3. =45*41/44
=(44+1)*41/44
=41+41/44
=41又44分之41
完毕(^o^)/~
=13/7*3/8+1/7*3/8
=(13/7+1/7)*3/8
=2*3/8
=3/4
=1/4*32+1/4+67*1/4
=1/4*(32+1+67)
=1/4*100
=25
3. =45*41/44
=(44+1)*41/44
=41+41/44
=41又44分之41
完毕(^o^)/~