Question

OBLICZ:

a)

(1 2/5+0,5):2=

b)

5/8 x 4,2 - (1/4 do potęgi 2)

Błagam to na jutro !!

Answer 1

[1 2/5+0,5]:2=[7/5+5/10]:2=[14/10+5/10]:2=19/10:2=19/10*1/2=19/20
5/8*4,2-[1/4]^=5/8*42/10-1/16=21/8-1/16=42/16-1/16=43/16=2 13/16