Răspuns:
Explicație pas cu pas:
a) 3/2 + 7/8 = (3×4)/(2×4)+7/8 = 12/8 + 7/8 = 19/8 = 2 intregi si 3/8
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b) 5/3 + 4/9 = (5×3)/(3×3) + 4/9 = 15/9 + 4/9 = 19/9 = 2 intregi si 1/9
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c) 13/2 + 4/15 =
= (13×15)/(2×15) + (4×2)/(15×2) =
= 195/30 + 8/30 =
= 203/30 =
= 6 intregi si 23/30
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d)
5/4 + 13/12 =
= (5×3)/12 + 13/12 =
= (15 + 13) /12 =
= 28/12 =
= (28:4)/(12:4)=
=7/3 =
= 2 intregi si 1/3
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e)
8/15 + 4/5 =
= 8/15 + (4×3)/(5×3)=
= 8/15 + 12/15 =
= (8+12)/15 =
= 20/15 =
= 4/3
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f)
11/9 + 5/18 = 3/2
= (11×2)/(9×2) + 5/18 =
= (22 + 5)/18 =
= 27/18 =
= (27:9)/(18:9) =
= 3/2 =
= 1 intreg si 1/2
