August 2018 1 19 Report
Dział równania i nierówności. Jakby ktoś miał sprawdzian z matematyki z podręcznika "Matematyka z plusem" to błagam powiedzcie co było.:)

Zadanie 1.
Jacek jest o 6 lat młodszy od Wojtka. Za 8 lat będą mieli razem 28 lat. Ile lat mają obecnie?

Zadanie 2.
Przeprowadź analizę zadania, ułóż równanie i rozwiąż je:
Przed 10 laty ojciec był 7 razy starszy od syna. Po upływie 15 lat ojciec będzie 2 razy starszy od syna. Ile lat ma obecnie ojciec?

Zadanie 3.
Ułóż równanie i rozwiąż je.
Ile soli należy dodać do 10 kilogramów wody aby otrzymać roztwór 16%?

Zadanie 4.
Ułóż równanie i rozwiąż je.
Z 2 litrów , zagęszczonego soku można zrobić 10 litrów napoju. Ile trzeba kupić litrów soku, aby wystarczył na zrobienie napoju dla 150 kolonistów przez 6 dni, jeśli jeden kolonista wypija dziennie 0,5 litra napoju?


Zadanie 5.
Rozwiąż równania;
a)2(3x-1)-(4x-3)+x=5(x+2)-3(x-2)-15
b)3x/4-1+4x/2=3/8-x

Zadanie 6.
W jednym koszyku 2,5 raza więcej jabłek niż w drugim. Jeżeli z tego koszyka przełożymy 15 jabłek do drugiego koszyka, to w obu będzie jednakowa ilość. Po ile jabłek jest w obu koszykach?

Zadanie 7.
Ile kilogramów 15% roztworu soli należy dodać do 10 kg 6% roztworu, aby otrzymać roztwór 9%?


Kto zrobi najwięcej zadań to dostanie naj.:)



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