Question

OBLICZ:ulamki

a) 3/4+4/5+5/6=

b) 2calosci 5/18+ 3calosci 5/9=

c) 5calosci 1/4+7calosci 11/12+ 1calosc 3/16=

d) 2calosci 7/15+3calosci 11/18+1calosc 13/21=

e) 3calosci 2/15-2calosci 7/9=

f) 5calosci 2/7-1calosc 11/21-2calosci 16/35=

/=kreska ulamkowa

Answer 1

a) 3/4 + 4/5 + 5/6 =
= 45/60 + 48/60 + 50/60 = 
= 143/60 = 
= 2 i 23/60
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b) 2calosci 5/18 + 3calosci 5/9 =
= 41/18 + 32/9 =
= 41/18 + 64/18 = 
= 105/18 = 
= 5 i 15/18
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c) 5calosci 1/4 + 7calosci 11/12 + 1calosc 3/16 =
= 21/4 + 84/12 + 19/16 = 
= 252/48 + 336/48 + 57/48 = 
= 645/48 = 
= 13 i 21/48 = 
= 13 i 7/16
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d) 2calosci 7/15 + 3calosci 11/18 + 1calosc 13/21 =

= 37/15 + 65/18 + 34/21 = 
= 1554/630 + 2275/630 + 1020/630 = 
= 4849/630 = 
= 7 i 439/630
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e) 3calosci 2/15 - 2calosci 7/9 =
47/15 - 25/9 = 
= 141/45 - 125/45 = 
= 16/45
==============================================
f) 5calosci 2/7 - 1calosc 11/21 - 2calosci 16/35 =
= 37/7 - 32/21 - 86/35 = 
= 555/105 - 160/105 - 258/105 = 
= 137/105 = 
= 1 i 32/105