Oblicz:
a) (3,1-2,1*2/3+1 2/5):6,2* 1 2/5 (to ułamek 2/5)=
b)(2,5-1 1/4+ 2/3) : 3 5/6 * 6/5=
Plis pomocy na dzisiaj ;] daje 10 punktów ;]
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a) (3,1-2,1*2/3+1 2/5):6,2* 1 2/5 (to ułamek 2/5)= (3,1 - 21/10 * 2/3 + 7/5): 6,2 * 7/5= (3,1 - 7/5+7/5): 6,2 * 7/5 = 3,1 : 6,2 * 7/5 = 0,5 * 7/5 = 0,7
b)(2,5-1 1/4+ 2/3) : 3 5/6 * 6/5= (2,5 - 1,25 + 2/3): 23/6 * 6/5 = (1,25 +2/3): 23/6 * 6/5 = (5/4 + 2/3): 23/6 * 6/5 = (15/12+8/12) : 23/6 * 6/5 =23/12 * 6/23 * 6/5 = 1/2 * 6/5 = 3/5