Alyonyshka1999

Verified answer

1. 1.3/4+1/5=3*5/20+4/20=19/20
    2.19/20*5/19=5/20=1/4=0.25
2.1.37/3-31/4=37*4/12-31*3/12=148/12-93/12=55/12
   2.55/12*6/11=5/2=2.5
3.1.13/5-5/8=104/40-25/40=79/40
   2.79/40:79/4=79/40*4/79=1/10=0.1
4.1.65/7*7/5=13
    2.13/13=1
    3.7целых3/7