1. 1)2 1/7-1 1/5=2 5/35-1 7/35=1 40/35-1 7/35=33/35, 2)3.5·33/35=7/2·33/35=33/10=
=3,3 3)4-3.3=0,7 4)0,7:0,16=7/10:16/100=7/10· 100/16=35/8=4 3/8
2. 1) 3/14:⅙=3/14·6/1=9/7=1 2/7 2)3 2/7 -1 2/7=2
3. 41 23/84-40 49/60=41 115/420-40 343/420=40 535/420-40 343/420= =192/420=96/210=48/105=16/35