Odpowiedź :
Odpowiedź:
Szczegółowe wyjaśnienie:
2 1/4 + 3 2/7 + 5 3/7 =2 1/4+8 5/7=2 7/28+8 20/28=10 27/28
5 1/4 - 4 3/4 =5 5/4 -4 3/4=1 2/4=1 1/2
8 1/3 - 6 1/3 =2
5 10/7 - 1 3/7 =4 7/7=5
3/7 + 4/5 =15/35+28/35=43/35=1 8/35
10 1/12 + 3/24 =10 2/24+3/24=10 5/24
1 1/2 + 2 1/3 =1 3/6 +2 2/6=3 5/6
3 1/2 - 1 3/4 =3 2/4 -1 3/4=2 6/4 -1 3/4=1 3/4
6 2/3 - 2 3/7 =6 14/21 -2 9/21=4 5/21
10 1/5 - 3 4/10 ==10 1/5 -3 2/5=9 6/5 -3 2/5=6 4/5
2/7 x 25/10 =50/70=5/7
10/20 x 25/15 =1/2*5/3=5/6
8 1/2 x 1 1/2 =17/2*3/2=51/4=12 3/4
9 3/4 x 2 1/8 =39/4*17/8=663/32=20 13/32
5/7 : 1/14 =5/7*14=5*2=10
1 1/2 : 3/2 =3/2: 3/2=3/2*2/3=1
3 1/5 : 2 1/6 =16/5:13/6=16/5*6/13=96/35=2 16/35
5 1/3 : 2/3 =16/3*3/2=8
10 1/2 : 5 1/4 =21/2 :21/4=21/2 *4/21=2
6 1/5 : 6 1/10 =31/5 :61/10=31/5*10/61=62/61=1 1/61