1 szkoły ponadpodstawowej

I liceum

I technikum

Matematyka poznać, zrozumieć 1.Zakres podstawowy. Po gimnazjum

Obliczamy 140% liczby 200 140%⋅200=1014​⋅200=1014⋅200​=14⋅20=280

Rozwiązanie 1

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Ponieważ pożyczka oprocentowana jest na 21%  skali roku, kwota, którą musi oddać Kasia będzie stanowić

Obliczmy, ile czystego kwasu siarkowego znajduje się w tej mieszaninie, sumując ilości znajdujące się w poszczególnych roztworach: 3kg⋅8%+5kg⋅12%=3kg⋅1008​+5kg⋅10012​=10024​kg+10060​kg=10084​kg

Obliczamy cenę drugiego podatku z VAT, czyli 123% normalnej ceny: 123%⋅5900zł=100123​⋅5900zł=123⋅59zł=7257zł

Obliczamy cenę telewizora po 15-procentowej obniżce: 100%−15%=85% 85%⋅3500zł=10085​⋅3500zł=85⋅35zł=2975zł

Początkowa zapłata za łubiankę: k  złotych

Oznaczmy sobie początkową pensje pracowników jako x. Pensja ta po podwyżce wynosi o 10% więcej, zatem 110% ceny początkowej: 110%⋅x=1,1⋅x=1,1x Poźniej obniżono ją o 10%, zatem obliczamy 90% z nowej pensji 1,1x

I turnus: 80 osób   II turnus: o 20% mniej niż 80, czyli 80% z 80 osób 80%⋅80=10080​⋅80=580​⋅4=16⋅4=64