Oblicz: PS są tylko dwa przykłady !!!!! za dobre rozwiązanie daje naj punktów ;P
a) (6 i 11/18 - 3,5)*2,5 - 4 i 1/3 : 0,65
b) (1,2 : 0,04 : 5 - 1 i 1/4) : (2,25 + 0,8 : 2 i 2/5)
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a)
(6 i 11/18 - 3,5)*2,5 - 4 i 1/3 : 0,65 =
= (119/18 - 7/2) * 2,5 - 4 i 1/3 : 65/100 =
= (119/18 - 63/18) * 2,5 - 13/3 * 100/65 =
= 56/18 * 5/2 - 100/15 =
= 140/18 - 100/15 =
= 700/90 - 600/90 =
= 100/90 =
= 10/9 =
= 1 i 1/9
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b)
(1,2 : 0,04 : 5 - 1 i 1/4) : (2,25 + 0,8 : 2 i 2/5) =
= (30 : 5 - 1,25) : (2,25 + 0,8 : 2,4) =
= (6 - 1,25) : (2,25 + 8/10 : 24/10) =
= 4,75 : (2,25 + 8/10 * 10/24) =
= 4,75 : (2,25 + 1/3) =
= 19/4 : ( 9/4 + 1/3) =
= 19/4 : (27/12 + 4/12) =
= 19/4 : 31/12 =
= 19/4 * 12/31 =
= 57/31 =
= 1 i 26/31