oblicz: 3,12 : _ - _ * (_ : 4/9 - 4,5 : _ ) = _ - _ * (_ - 1,125) = _ - _ * (4 i 7/8) = _ - 39 = 39.
* - razy
4/9 - cztery dziewiąte.
4 i 7/8 - cztery całe i siedem ósmych.
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3,12 : 0,04 - 8 * (8/3 : 4/9 - 4,5 : 4 ) = 78 - 8 * (6 - 1,125) = 78 - 8 * (39/8) = 78 - 39 = 39.
spr.
3,12 : 0,04 - 8 * (8/3 : 4/9 - 4,5 : 4 ) = 78 - 8 * (8/3 * 9/4 - 1,125) = 78 - 8 * (6 - 1,125) = 78 - 8 * 4,875 = 78 - 39 = 39
4/9 cztery dziewiate