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Inversul numărului 2/3×15/8+3/2÷2 este ....

Răspuns :

2/3×15/8+3/2÷2  = 10/8 + 3/4 = 10/8 +6/8 = 16 /8 = 2    inversul  1/2   iar  opusul  -2 
[tex] \frac{2}{3} \cdot \frac{15}{8} +\frac{3}{2}:2=\\ \frac{5}{4} + \frac{3}{2} \cdot\frac{1}{2}=\\ \frac{5}{4} +\frac{3}{4}=\frac{8}{4}=2 [/tex]
Inversul este [tex] \frac{1}{2} [/tex]