⅗ - (1,4 × ⁵/₁₄ - ⁰'⁹/₃²) : (- ⅕) =
proponuje sprowadzić do ułamków zwykłych
3/5-(14/10•5/14-9/10•1/9)•-5=
3/5-(1/2-1/10)•-5=
3/5-2/5•-5=
3/5+2=2 3/5
⅘ : (⅙ - ⅕) - ( ²/₉ - (⅜ - 1⅓ )) =
4/5:(5/30-6/30)-(2/9-(9/24-32/24))=
4/5•-30-(2/9-(23/24))=
-24-16/72+69/72=-23-(72+53)/72=-23-19/72
(1⅔ ×(-9,3)+ 1³/₇ ×(- 0,7)) × (-2²) =
(5/3•-93/10+10/7•-7/10)•4
(-31/2-1)•4=
-33/2•4=-66
