Question

oblicz:

b) 1/2 - 3/8=

c)11/12+13/18=

d) 5/6-7/15=

e)2.1/2 +7.1/5

f).6.7/12+2.13/15

g)10.3/4-8.5/12

h)3.1/6-1.5/8

i)4.5/12-2.17/30

l)12.3/4-1/8-2.3/5

Answer 1

b) 1/2 - 3/8 = 4/8 - 3/8 = 1/8

c) 11/12 + 13/18 = 33/36 + 26/36 = 59/36 = 1 i 23/36

d) 5/6 - 7/15 = 25/30 - 14/30 = 11/30

e) 2 i 1/2 + 7 i 1/5 = 5/2 + 36/5 = 25/10 + 72/10 = 97/10 = 9 i 1/10

f) 6 i 7/12 + 2 i 13/15 = 79/12 + 43/15 = 395/60 + 172/60 = 567/60 = 9,45

g) 10 i 3/4 - 8 i 5/12 = 43/4 - 101/12 = 129/12 - 101/12 = 28/12 = 2 i 1/3

h) 3i 1/6 - 1 i 5/8 = 19/6 - 13/8 = 76/24 - 39/24 = 37/24 = 1 i 13/24

i) 4 i 5/12 - 2 i 17/30 = 53/12 - 77/30 = 265/60 - 154/60 = 111/60 = 1 i 51/60

j) 12 i 3/4 - 1/8 - 2 i 3/5 = 51/4 - 1/8 - 13/5 = 510/40 - 5/40 - 104/40 = 505/40 - 104/40 = 401/40 = 10 i 1/40