Treść zadania

Bery12

zad. 2 strn. 76

Znajdź liczbę:

o 0,1 % mniejsza od 250.

o 2,5% mniejsza od 32.

Zadanie jest zamknięte. Autor zadania wybrał już najlepsze rozwiązanie lub straciło ono ważność.

Najlepsze rozwiązanie

  • 2 0

    a)
    liczba o 0,1 % mniejsza od 250.

    0,1 % = 0,001


    250 - 0,1% * 250 =

    = 250 - 0,001 * 250 =

    = 250 - 0,25=

    = 249,75


    Szukana liczba to 249,75




    b)
    Liczba o 2,5% mniejsza od 32.

    2,5 % = 0,025



    32 - 2,5% * 32=

    = 32 - 0,025 * 32=

    = 32 - 0,8=

    = 31,2


    Szukana liczba to 31,2

Rozwiązania

  • userphoto

    o 0,1 % mniejsza od 250.

    250- 250 * 0,1% = 250 - 250 * 0,001 = 250 -0,25 = 249,25


    o 2,5% mniejsza od 32.

    32-32 * 2,5% = 32 - 32 * 0,025 = 32 - 0,8 = 31,2

  • adamek94

    100% - 0,1% = 99,9%

    250 -------- 100%
    X ---------- 99,9%
    X= 250 *99,9 / 100 = 249,75

    100 - 2,5% = 97,5%
    32 -------------100%
    X -------------97,5%
    X' = 32 * 97,5 / 100% = 31,2

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