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1.(1,4 + 3,5:1,25):2,4+3,4:2,125-0,35= (1,4-2,8):2,4+1,6-0,35= -1,4:2,4+1,25=-14/10:24/10+125/100= 125/100=15/12 -7/12+15/12=8/12=2/3 2. [(3/10*5/6+2 3/4)*2/3]:4/7= [(1/4+2 3/4)*2/3]4/7= (3*2/3):4/7=2:4/7=2*7/4=14/4=7/2=3,5 to musi być dobrze
=4,2:2,4+3,4:2,125-0,35=1,75+1,6-0,35=3,35-0,35=3
2. (³/₁₀*⁵/₆+2¾)*⅔ .............(¹⁵/₆₀+¹¹/₄)*⅔...(¹⁵/₆₀+¹⁶⁵/₆₀)*⅔
_______________________=______________=________________=
4/7....................................⁴/₇.................⁴/₇............
..¹⁸⁰/₆₀*⅔......³⁶⁰/₁₈₀....
=__________=________=2*⁷/₄=3,5
.....⁴/₇........⁴/₇......
(1,4-2,8):2,4+1,6-0,35=
-1,4:2,4+1,25=-14/10:24/10+125/100= 125/100=15/12
-7/12+15/12=8/12=2/3
2. [(3/10*5/6+2 3/4)*2/3]:4/7=
[(1/4+2 3/4)*2/3]4/7=
(3*2/3):4/7=2:4/7=2*7/4=14/4=7/2=3,5
to musi być dobrze