2całe 1/3 :7 w liczniku, a w mianowniku 3.5 ten ułamek dodajem do drugiego ułamka 4 w liczniku i 3całe i 3/5 * 0.2 w mianowniku,
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2⅓:7 4
------ + ------------ =
3,5 3⅗·0,2
⁷/₃·¹/₇ ⁴/₁
--------- + ---------- =
³⁵/₁₀ ¹⁸/₅·²/₁₀
⅓ ⁴/₁
----- + ------ =
³⁵/₁₀ ¹⁸/₂₅
⅓·¹⁰/₃₅ + ⁴/₁·²⁵/₁₈= ¹⁰/₁₀₅ + ⁵⁰/₉= ⁹⁰/₉₄₅+⁵²⁵⁰/₉₄₅=⁵³⁴⁰/₉₄₅=5 ⁶¹⁵/₉₄₅
2i1/3 :7 4 7/3: 7/1 4 7/3 * 1/7 4
_______ + _________ = __________ + _______ = _________ + ______ =
3,5 3i3/5*0,2 3,5 18/5*2/10 3,5 9/5*2/5
1/3*1/1 4 1/3 4/1
________ + _______ = _______ + _______= 1/3: 35/10 + 4/1 : 18/25 =
3,5 18/25 35/10 18/25
= 1/3 * 10/35 +4/1 * 25/18 = 10/105 + 2/1*25/9 = 10/105+50/9= 90/945+5250/945=
= 5340/945 = 5 i 615/945 = 5 i 123/189= 5 i 41/63