zad 4 i 5 strona 43 klasa 5 wysyłam w załączniku
daje naj

A) 1 1/3 * 2/5 = 4/3 * 2/5 = 12/15 * 6/15 = 72/15
B) 5 1/2 * 3/4 = 11/2 * 3/4 = 22/4 * 3/4 = 66/4
C) 3/8 * 6 3/4 = 3/8 * 27/4 = 3/8 * 54/8 = 162/8
D) 2 2/5 * 5 1/2 = 12/5 * 11/2 = 24/10 * 55/10 = 1320/10
E) 1 2/3 * 3 1/8 = 5/3 * 25/8 = 40/24 * 75/24 = 3000/24
F) 4 1/6 * 3 1/4 = 25/6 * 13/4 = 50/12 * 39/12 = 1950/12
wyjaśnienie: * to razy jak coś