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Calculează : 5×(2×5+1) - 4×5+1

Răspuns :

5·(10+1)-4·5+1=5·11-4·5+1=55-20+1=35+1=36

5x(2x5+1)-4x5+1

5x(10+1)-4x5+1

5x11-4x5+1

55-20+1=36