Question

Oblicz:
a) 1 2/3 + 2 3/4 + 3 4/5 * (8 2/5 - 7 3/20)
b) 2 3/5 * 6 1/4 - 3 1/4 : 3 5/7 + 0,625
c) 4 4/5 : 1,6 * 1 7/8 - 1 5/8 + 2,25

Answer 1

A)  1 2/3 + 2 3/4 + 3 4/5 * (8 2/5 - 7 3/20) = 5/3 + 11.4 + 19/5 * (42/5 - 143/20) = 20/12 + 33/10 + 19/5 * (168/20-143/20) = 53/12 + 19/5 * 25/20 = 265/60 + 1140/60 * 25/20 =  1405/60 * 25/20 = 35125/1200 = 29 325/1200
b) 2 3/5 * 6 1/4 - 3 1/4 : 3 5/7 + 0,625 = 13/5 : 25/4  13/4 : 26/7 + 0,625 = 13/5 ( 4/25 - 13/4 * 7/26 + 0,625 = 52/125 - 21/104 + 0,625 = 0,416 - 0,201923 + 0,625 = 0,214077 + 0,625 = 0,839077
c) 4 4/5 : 1,6 * 1 7/8 - 1 5/8 + 2,25 = 24/5 : 1.6 * 15/8 - 13/8 + 2.25 = 4,8 : 1,6 ( 2/8 + 2,25 = 3 * 2/8 + 2,25 = 0,0625 + 2,25 = 2,3125
Mam nadzieję, że pomogłam. Pozdrawiam :)