Question

Rozwiąż ułamki zwykłe ; a ) 1/3 + 4/5 =

b ) 1/2 - 3/7 =

c) 4 5/6+ 3 1/3 =

d) - 3/4 + 2/5 =

e) 3/4* 5/9 =

f ) 4 1/2* 3/4 =

g ) (-3 5/6)* (- 2 1/2)=

h) 3/7 * (-2 1/4) =

i ) 4/9 : 4/3 =

j ) 1 1/3 : 2/4 =

k ) -3 1/2 : 2 3/4 =

l ) 4 1/2 : (-2 3/4) =

Answer 1

a) 1/3 + 4/5 = 5/15 + 12/15 = 17/15 = 1 i 2/15

b) 1/2 - 3/7 = 7/14 - 6/14 = 1/14

c) 4i5/6 + 3i1/3 = 29/6 + 10/3 = 29/6 + 20/6 = 49/6 = 8i1/6

d) -3/4 + 2/5 = -15/20 + 8/20 = -7/20

e) 3/4 * 5/9 = 5/12

f) 4i1/2 * 3/4 = 9/2 * 3/4 = 27/8 = 3i3/8

g) (-3i5/6) * (-2i1/2) = -23/6 * (-5/2) = 115/12 = 9i7/12

h) 3/7 * (-2i1/4) = 3/7 * (-9/4) = (-27/28)

i) 4/9 : 4/3 = 4/9 * 3/4 = 1/3

j) 1i1/3 : 2/4 = 4/3 : 2/4 = 4/3 * 4/2 = 8/3 = 2i2/3

k) -3i1/2 : 2i3/4 = -7/2 : 11/4 = -7/2 * 4/11 = -14/11 = -1i3/11

l) 4i1/2 : (-2i3/4) = 9/2 : (-11/4) = 9/2 * (-4/11) = (-18/11) = (-1i7/11)

Answer 2

a ) 1/3 + 4/5 = 5/15 + 12/15 = 17/15 = 1 2/15

b ) 1/2 - 3/7 = 7/14 - 6/14 = 1/14

c) 4 5/6+ 3 1/3 = 4 5/6 + 3 2/6 = 1 3/6 = 1 1/2

d) - 3/4 + 2/5 = - 15/20 + 8/20 = - 7/20

e) 3/4* 5/9 = 3/4 * 5/9 = 5/9

f ) 4 1/2* 3/4 = 9/2 * 3/4 = 4 3/6 = 4 1/2

g ) (-3 5/6)* (- 2 1/2)= -23/6 * (-5/2) = 9 7/12

h) 3/7 * (-2 1/4) = 3/7 * (-9/4) = -27/28

i ) 4/9 : 4/3 = 12/36 = 1/3

j ) 1 1/3 : 2/4 = 16/6 = 2 2/3

k ) -3 1/2 : 2 3/4 = -7/2 * 4/11 = - 28/22 = - 1 6/22 = - 1 3/11

l ) 4 1/2 : (-2 3/4) = 9/2 * (-4/11) = -36/22 = -1 14/22 = -1 7/11

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