1 szkoły ponadpodstawowej

I liceum

I technikum

MATeMAtyka 1. Zakres podstawowy. Po gimnazjum

a) 15%⋅50=100215​⋅501=215​=721​

b) 45 zł obniz˙ka o 10%<svg xmlns="http://www.w3.org/2000/svg" width='400em' height='0.522em' viewBox='0 0 400000 522' preserveAspectRatio='xMaxYMin slice'><path d='M0 241v40h399891c-47.3 35.3-84 78-110 128
-16.7 32-27.7 63.7-33 95 0 1.3-.2 2.7-.5 4-.3 1.3-.5 2.3-.5 3 0 7.3 6.7 11 20
 11 8 0 13.2-.8 15.5-2.5 2.3-1.7 4.2-5.5 5.5-11.5 2-13.3 5.7-27 11-41 14.7-44.7
 39-84.5 73-119.5s73.7-60.2 119-75.5c6-2 9-5.7 9-11s-3-9-9-11c-45.3-15.3-85
-40.5-119-75.5s-58.3-74.8-73-119.5c-4.7-14-8.3-27.3-11-40-1.3-6.7-3.2-10.8-5.5
-12.5-2.3-1.7-7.5-2.5-15.5-2.5-14 0-21 3.7-21 11 0 2 2 10.3 6 25 20.7 83.3 67
 151.7 139 205zm0 0v40h399900v-40z'/></svg>​45 zł⋅0,9=40,50 złpodwyz˙ka o 20%<svg xmlns="http://www.w3.org/2000/svg" width='400em' height='0.522em' viewBox='0 0 400000 522' preserveAspectRatio='xMaxYMin slice'><path d='M0 241v40h399891c-47.3 35.3-84 78-110 128
-16.7 32-27.7 63.7-33 95 0 1.3-.2 2.7-.5 4-.3 1.3-.5 2.3-.5 3 0 7.3 6.7 11 20
 11 8 0 13.2-.8 15.5-2.5 2.3-1.7 4.2-5.5 5.5-11.5 2-13.3 5.7-27 11-41 14.7-44.7
 39-84.5 73-119.5s73.7-60.2 119-75.5c6-2 9-5.7 9-11s-3-9-9-11c-45.3-15.3-85
-40.5-119-75.5s-58.3-74.8-73-119.5c-4.7-14-8.3-27.3-11-40-1.3-6.7-3.2-10.8-5.5
-12.5-2.3-1.7-7.5-2.5-15.5-2.5-14 0-21 3.7-21 11 0 2 2 10.3 6 25 20.7 83.3 67
 151.7 139 205zm0 0v40h399900v-40z'/></svg>​40,50 zł⋅1,2=48,60 zł

b) początkowa cena:   x

<table style="border:none;border-collapse: collapse;width: 624px;"> <tbody> <tr style="height: 0px;"> <td style="vertical-align: top;padding:7px 7px 7px 7px;border:solid #000000 1px;"> cena w lutym [zł] &nbsp;</td> <td style="vertical-align: top;padding:7px 7px 7px 7px;border:solid #000000 1px;"> cena w marcu [zł] &nbsp;</td> <td style="vertical-align: top;padding:7px 7px 7px 7px;border:solid #000000 1px;"> zmiana ceny &nbsp;</td> </tr> <tr style="height: 0px;"> <td style="vertical-align: top;padding:7px 7px 7px 7px;border:solid #000000 1px;"> 156 &nbsp;</td> <td style="vertical-align: top;padding:7px 7px 7px 7px;border:solid #000000 1px;"> 140,40 &nbsp;</td> <td style="vertical-align: top;padding:7px 7px 7px 7px;border:solid #000000 1px;"> obniz˙ka o 10% &nbsp;</td></tr></tbody></table>

$cena w lutym [z ł]$	$cena w marcu [z ł]$	$zmiana ceny$
$156$	$140, 40$	$obni \overset{z}{˙} ka o 10%$

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