znajdź liczbę której : a)2/7 stanowi 1 3/5 b) 3/4 stanowi 3 1/2 c) 1 1/3 stanowi 6 d) 2 2/5 stanowi 6 3/4 pomozesz plis?
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a)
szukana liczba =x
2/7·x =1³/₅
2/7x=8/5
x=8/5 · 7/2 =56/10=5.6
b)3/4·x=3½
3/4x=7/2
x=7/2· 4/3 =14/6=2⅓
c)1⅓·x=6
4/3 ·x=6
x=6 ·3/4 =18/4=4,5
d)2⅖·x=6¾
12/5 ·x=27/4
x=27/4 · 5/12 =135/48=2 i 39/48