Question

1.30-23.1:(5целых7/20-4целых6/35

Answer 1

1) 5 7/20-4 6/35=5 49/140-4 24/140=1 25/140=1 5/28
2) 23,1:1 5/28=321/10:33/28=231/10*28/33=7/5*14/1=98/5=19 3/5
3) 1,30-19 3/5=130/100-98/5=13/10-98/5=65/50-980/50=
=-915/50=-18 15/50=-18 3/10