а) 3/8 : 2/5=3/8*5/2=15/16 пр. 15/16*2/5=3/8
б) 4/25 :8/15=4/25*15/8=3/10 пр. 3/10*8/15=4/25
в) 2/5 : 4/5=2/5*5/4=1/2 пр.1/2*4/5=2/5
г)8/45:4/15=8/45*15/4=2/3 пр. 2/3*4*15=8/45
д)1/10 : 3/1= 1/10*1/3=1/30 пр. 1/30*3/1=1/10
е) 4/19 :2/1=4/19*1/2=2/19 пр. 2/19*2/1=4/19
Ё)3/16 : 4/1=3/16*1/4=3/64 пр. 3/64*4/1=3/16
- 5/6 - 1.37 + 2.87 + 1/3 =
1/3 - 5/6 = 2/6 - 5/6 = - 3/6 = - 1/2 = 0.5
- 1.37 + 2.87 = 1,5
0.5 + 1.5 = 2