(1)4.85+12.75÷1.7*2.6
=4.85+7.5*2.6
=4.85+19.5
=24.35
(2)18.32-9.47+11.68-10.53
=18.32+11.68-(9.47+10.53)
=30-20
=10
(3)(284+486)÷(9.1-7.56)
=770÷1.54
=500
(4)36*(5/12+3/4-1/6-4/9)
=36*5/12+36*3/4-36*1/6-36*4/9
=15+27-6-16
=20
(5)7.4*3/8-37.5%+9.6÷(8/3)
=(7.4+9.6)*3/8-0.375
=17*3/8-0.375
=6.375-0.375
=6
(6)14/15÷【18+(5/6-5/8)*48】
=14/15÷(18+40-30)
=14/15÷28
=1/30