1,097*100= 31/5+1,8= 1,75+2/23= 1/27*1,4= 2,7:3 2/4 = (0,3)do potęgi 2 = 420-20/3/4+6,25:5/8 = to np. 1/2 to ułamek

1,097 * 100 = 109,7 31/5 + 1,8 = 31/5 + 9/5 = 38/5 = 7 3/5 3 1/5 + 1,8 = 3,2 + 1,8 = 5 1,75 + 2/23 = 1 3/4 + 2/23 = 7/4 + 2/23 = 161/92 + 8/92 = 169/92 = 1 77/92 1/27  * 1,4 = 1/27 * 7/5 = 7/135 2,7 : 3 2/4 = 27/10 : 14/4 = 27/10 * 4/14 = 27/5 * 2/14 = 54/75 (0,3)^2 = (3/10)^2 = 9/100 = 0,09 420 - 20 3/4 + 6,25 : 5/8 = 399 1/4 + 6 1/4 : 5/8 = 399 1/4 + 25/4 * 8/5 = 399 1/4 + 5 * 2 = 399 1/4 + 10 = 409 1/4