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2.24*20% = 24 * 20/100 =4,8
Ania odrabiała lekcje przez 4,8 godz.
=(p+r) (2p-2r)=
=2(p+r)(p-r)
= 2(p²-r²)
2.24*20% = 24 * 20/100 =4,8
Ania odrabiała lekcje przez 4,8 godz.=4hi48minut