6calych 3/4- 2 1/2 3 1/3- 1 5/7 13*2/27 4*16/32 11:9/11 15* 3 5/12 1 3/8:5 20/21:25 / kreska ulamkowa proszę bo bardzo dokładne obliczenia

6 3/4-2 1/2=6 3/4-2 2/4=4 1/4 3 1/3-1 5/7=3 7/21-1 15/21=2 28/21-1 15/21=1 13/21 13x2/27=26/27 4x16/32=64/32=2 11:9/11=11x11/9=121/9=13 4/9 15x3 5/12=15x41/12=615/12=51 3/12=51 1/4 1 3/8:5=11/8x1/5=11/40 20/21:25=20/21x1/25=4/21x1/5=4/105

6 i 3/4 - 2 i 1/2 = = 6 i 3/4 - 2 i 2/4= = 4 i 1/4 3 i 1/3- 1 i 5/7= = 3 i 7/21 - 1 i 15/21 = = 2 i 28/21 - 1 i 15/21= = 1 i 13/21 13*2/27 =26/27 4*16/32 = (skracam 4 z 32) = 1 * 16/8= = 16/8= = 2 11:9/11= = 11 * 11/9 = = 121/9 = = 13 i 4/9 15* 3 i 5/12= = 15 * 41/12 = (skracam 15 z 12) = 5 * 41/4= = 205/4=  = 51 i 1/4 1 i 3/8:5 = = 11/8 * 1/5= = 11/40 20/21:25 = = 20/21 * 1/25= (skracam 20 z 25) = 4/21 * 1/5= = 4/105