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b) 5/12 + 2 3/8 = 10/24 + 2 9/24 = 2 19/24
c) tego nie wiem
d) 5/16 : 2 1/12 = 5/16 * 12/25 = 3/20
e) 5/6 + (-0,75) = 5/6 + (-75/100) = 500/600 + (- 450/600) = -1 350/600 = 1 35/60
f) 3 1/25 - 0,44 = 3,04 - 0,44 = 2,6
g) -5/6 * ( - 2,4) = -5/6 * (- 2 4/10) = -50/60 * ( - 2 24/60) = - 50/60 * ( - 144/60) = 720/360 = 2
h) -0,15 : ( -9/16) = - 15/100 * ( -16/9) = 48/180 = 4/15
Proszę mam nadzieję, że dobrze :)