PROSZE O POMOC!!!!!!!!! Zad.10/13 (matematyka wokół nas gim zbiór zadań) Oblicz jak najprostszym sposobem. a) 2/3*4/5+2/3*2/5*2/3*0,6= b) 1/2*6/7-0,5*3/7-2/7*2/4= c) 1/4*2 2/3-1 1/6*1/4+1/2*0,25= d)0,3*3 3/8-2,25*3/10+6/20*8 /78= POMOCYYY!!!!!! Z GÓRY DZIĘKUJE!!!!!! :D
b) = 1/2 * 6/7 - 1/2 * 3/7 - 2/7 * 2/4 = 3/7 - 1/2 * 3/7 - 1/14 = 3/7 - 3/14 - 1/14 = 6/14 - 4/14 = 2/14 = 1/7
c) = 1/4 * 8/3 - 7/6 * 1/4 + 1/2 * 1/4 = 4 - 7/24 + 1/8 = 4 - 7/24 + 3/24= 4 - 10/24 = 3 14/24 = 3 7/12
d) = 3/10 * 27/8 - 9/4 * 3/10 + 6/20 * 71/8 = 81/80 - 27/40 +213/80 = 81/80 - 54/80 +213/80 = 240/80 = 3