zamień ułamki dziesiętne na ułamki zwykłe i oblicz: a)2/3+0,25= b)0,75-3/7= c)2i1/3:0,28= d)2,8*1i3/7 Z GÓRY DZIĘKUJE:)

a) 2/3 + 0,25 = 2,30 + 0,25 = 3,55 b) 0,75 - 3/7 = 0,75 - 3,70 = 2,95 c) 2 i 1/3 : 0,28 = 2,10 : 0,28 = 7,50 d) 2,8 x 1i3/7 = 2,8 x 1,3 = 4,1

a) 2/3+0,25= = 2/3 + 25/100 = = 2/3 + 1/4= = 8/12 + 3/12= = 11/12 b) 0,75-3/7= = 75/100 - 3/7 = = 3/4 - 3/7= = 21/28 - 12/28= = 9/28 c) 2i1/3:0,28= = 7/3 : 28/100= = 7/3 : 7/25= = 7/3 * 25/7= = 1/3 * 25/1= = 25/3= = 8 i 1/3 d) 2,8*1i3/7= = 2 i 8/10 * 10/7= = 2 i 4/5 * 10/7= = 14/5 * 10/7 = = 2/1 * 2/1 = = 4/1= = 4