dzielenie ułamków przez liczby naturalne oblicz a)2 1/2:5-1/3= b)(3 1/3+5/9):7= c)(1 4/7-1 1/3):10= d)(5 1/5-2 3/4):2 do kwadratu= e)[(2 1/2)do kwadratu-3/4]:11= f)(2 1/3)do kwadratu:7-2/3=

a) 2i1/2 :5 -1/3 = 5/2 * 1/5 - 1/3= 1/2 *1/1 -1/3= 1/2 -1/3= 3/6 -2/6= 1/6   b) (3i1/3 +5/9) :7= (3i3/9 +5/9) :7= 3i8/9 :7= 35/9 * 1/7= 5/9 *1/1= 5/9   c) (1i4/7 -1i1/3) :10= (1i12/21 -1i7/21) :10= 5/21 *1/10 = 1/21 *1/2 = 1/42   d) (5i1/5 -2i3/4) :2^2 = (5i4/20 -2i15/20) : 4= (4i24/20 -2i15/20):4=      = 2i9/20 *1/4= 49/20 *1/4= 49/80   e) [(2i1/2)^2 -3/4] :11= [(5/2)^2 -3/4] :11= [25/4 -3/4]:11= 22/4 *1/11=       = 2/4*1/1= 2/4 = 1/2    f) (2i1/3)^2 :7 - 2/3= (7/3)^2 :7 - 2/3= 49/9 *1/7 -2/3= 7/9 *1/1 -2/3=     = 7/9 - 2/3= 7/9 - 6/9 = 1/9