Question

jedyna126 minut temu czy pomożesz jeszcze>?
4.2/3+2. 5/9=
2.5/6+ 4.2/5=
5.1/3+2.5/7=
4.3/5-1.3/4=
5.2/5-2.2/3=
4.3/5-1.5/8=
15.1/6-8.5/8
proszę

Answer 1

4.2/3+2. 5/9= 4 6/9 + 2 5/9 = 6 11/9 = 7 2/9
2.5/6+ 4.2/5= 2 25/30 + 4 12/30 = 6 37/30 = 7 7/30
5.1/3+2.5/7= 5 7/21 + 2 15/21 = 7 22/21 = 8 1/21
4.3/5-1.3/4= 4 12/20 - 1 15/20 = 3 32/20 - 1 15/20 = 2 17/20
5.2/5-2.2/3= 5 6/15 - 2 10/15 = 4 21/15 - 2 10/15 = 2 11/15
4.3/5-1.5/8= 4 24/40 - 1 25/40 = 3 64/40 - 1 25/40 = 2 39/40
15.1/6-8.5/8 = 15 4/24 - 8 15/24 = 14 28/24 - 8 15/24 = 6 13/24