Oblicz ułamki :
1/7 + 5/14
3/4 + 5/12
8/9 - 5/18
1/3 + 3/4
3/5 - 1/2
1 1/2 - 1/3
1 1/2 + 3/8
1 1/3 - 2/9
2 3/5 - 7/10
Proszę :) to wszystko to są ułamki tylko że nie wiem jak je miałam napisać więc tak to wygląda xD
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1/7 + 5/14=1/7*2+5/14=2/14+5/14=7/14:7=1/2
3/4 + 5/12=3/4*3+5/12=9/12+5/12=14/12=1 2/12=1 1/6
8/9 - 5/18=8/9*2-5/18=16/18-5/18=11/18
1/3 + 3/4=1/3*4+3/4*3=4/12+9/12=13/12=1 1/12
3/5 - 1/2=3/5*2-1/2*5=6/10-5/10=1/10=0,1
1 1/2 - 1/3=3/2*3-1/3*2=9/6-2/6=7/6=1 1/6
1 1/2 + 3/8=3/2*4+3/8=12/8+3/8=20/8=2 4/8=2 1/2
1 1/3 - 2/9=4/3*3-2/9=12/9-2/9=10/9=1 1/9
2 3/5 - 7/10=13/5*2 - 7/10= 26/10-7/10=9/10
1/7 + 5/14 = 2/14 + 5/14 = 7/14 = 1/2
3/4 + 5/12 = 9/12 + 5/12 = 14/12 = 1 2/12 = 1 1/6
8/9 - 5/18 = 16/18 - 5/18 = 11/18
1/3 + 3/4 = 4/12 + 9/12 = 13/12 = 1 1/12
3/5 - 1/2 = 6/10 - 5/10 = 1/10
1 1/2 - 1/3 = 1 3/6 - 2/6 =1 1/6
1 1/2 + 3/8 = 1 4/8 + 3/8 = 1 7/8
1 1/3 - 2/9 = 1 3/9 - 2/9 = 1 1/9
2 3/5 - 7/10 = 2 6/10 - 7/10 = 1 16/10 - 7/10 = 1 9/10
1. 1/7+5/14= 2/14+5/14=7/14=1/2
2. 3/4+5/12=9/12+5/12=14/12=1 2/12= 1 1/6
3. 8/9-5/18=16/18-5/18=11/18
4. 1/3+3/4=4/12+9/12=13/12=1 1/12
5. 3/5-1/2=6/10-5/10=1/10
6. 1 1/2-1/3=3/2-1/3=18/12-4/12=14/12=1 2/12=1 1/6
7. 1 1/2+3/8=3/2+3/8=12/8+3/8=15/8=1 7/8
8. 1 1/3-2/9=4/3-2/9=12/9-2/9=10/9=1 1/9
9. 2 3/5-7/10=13/5-7/10=26/10-7/10=19/10=1 9/10
Chyba wszystko ;) mam nadzieję że się zgadza