prosze o pomoc oblicz i skroc jak to mozliwe? 5 calychrazy9/10=? 2 cale razy1 calai 3/8=? 5/7razy3/10=? 5/6razy3/2=? 1 cala i 2/5 razy10/11=? 3 calei 1/2 razy 1 cala i 1/3=?

5*9/10=9/2=4i1/2 2*1I3/8=2*11/8=11/4=2i3/4 5/7*3/10=3/14 5/6*3/2=5/4=1i 1/4 1i2/5*10/11=7/5*10/11=14/11=1i3/11 3i1/2*1i1/3=7/2*4/3=14/3=4i2/3

5 calychrazy9/10=? 5 * 9/10 = 9/2 = 4 1/2 2 cale razy1 calai 3/8=? 2 * 1 3/8 = 2 * 11/8 = 11/4 = 2 3/4 5/7razy3/10=? 5/7 * 3/10 = 1/7 * 3/2 = 3/14 5/6razy3/2=? 5/6 * 3/2 = 5/2 * 1/2 = 5/4 = 1 1/4 1 cala i 2/5 razy10/11=? 1 2/5 * 10/11 = 7/5 * 10/11 = 7 * 2/11 = 14/11 = 1 3/11 3 calei 1/2 razy 1 cala i 1/3=? 3 1/2 * 1 1/3 = 7/2 * 4/3 = 7 * 2/3 = 14/3 = 4 2/3