Question

2/3-0,8*5/16+1 3/5:1 1/7=

Answer 1

2/3 - 0,8*5/16+1 3/5:1 1/7 = 2/3 - 4/5 * 5/16+ 8/5 * 7/8= 2/3 - 1/4 + 56/40 = 8/12 - 3/12 + 56/40= 5/12 + 56/40 = 5/12 + 7/5 = 20/60 + 84/60 = 104/60 = 1 44/60 =      =1 11/15 (Nie wiem czy dobrze ale na 80% tak :) )

Answer 2

2/3 - 0,8 * 5/16 + 1 i 3/5 : 1 i 1/7=

= 2/3 - 8/10 * 5/16 + 8/5 : 8/7=

= 2/3 - 1/2 * 1/2  + 8/5 * 7/8 =

= 8/12 - 3/12 + 1/5 * 7/1=

= 5/12 + 7/5=

= 5/12 + 1 i 2/5=

= 25/60 + 1 i 24/60 =

= 1 i 49/60