Question

1) 5\12+4\15 2)3\4+5\18 3)2\26+3\39 4)7\34+5\51 5)4\210+5\140 6)7\450+8\180 7)9\180+7\120 заранее ! 40 ! )

Answer 1

1)$\frac{5}{12} + \frac{4}{15} = \frac{41}{60}$
2)$\frac{3}{4} + \frac{5}{18} =1 \frac{1}{36}$
3)$\frac{2}{26} + \frac{3}{39} = \frac{2}{13}$
4)$\frac{7}{34} + \frac{5}{51} = \frac{31}{102}$
5)$\frac{4}{210} + \frac{5}{140} = \frac{23}{420}$
6)$\frac{7}{450} + \frac{8}{180} = \frac{3}{50}$
7)$\frac{9}{180} + \frac{7}{120} = \frac{13}{120}$

Answer 2

1) 5/12+4/15=25/60+16/60=41/60
2) 3/4+5/18=27/36+10/36=37/36=1 1/36
3) 2/26+3/39=12/156+12/156=24/156=4/26
4) 7/34+5/51=42/204+20/204=62/204=31/102
5) 4/210+5/140=16/840+30/840= 46/840=23/420
6) 7/450+8/180=14/900+40/900=54/900=6/100
7) 9/180+7/120=18/360+21/360=39/360=13/120