а)0,5•1,6+14,911:3,7 = 0,8+4,03 = 4,83

б)1,3•(313,2:8,7-5,3) = 1,3(36-5,3) = 1,3•30,7 =

= 39,91

в)9,396:2,7-5,6•0,2 = 3,48-1,12 = 2,36

г)12,5•2,5-8,6•2,5+2,1•2,5 = 31.25-21,5+2,1-2,5 =

= 9,35

д)0,4²+16/25:0,0128 = (2/5)²+16/25:8/625 =

= 4/25+16/25•625/8 = 4/25+2•25 = 4/25+50 =

= 1254/25 = 50 4/25

е)2,5²-1,5²+3 3/7 = (5/2)²-(3/2)²+24/7 =

= 25/4-9/4+24/7 = 52/7 = 7 3/7