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a fost răspuns

Calculati: 5pe4-1pe2; 7pe2-1pe5; 2pe5-1pe2; 11pe4-3pe2; 11pe12-5pe18; 37pe45-17pe30
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Răspuns :

5/4 - 1/2 = 5-2/4 = 3/4
7/2 - 1/5 = 35-2/10 = 33/10
2/5 - 1/2 = 4-5/2 = -1/2
11/4 - 3/2= 11-6/4= 5/4
11/12 - 5/18 = 33-10/36 = 23/36
37/45 - 17/30 = 1110-765/1350 = 345/1350 = 69/270 = 23/90

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