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Va rog mult de tot....

Va Rog Mult De Tot class=

Răspuns :

2*3+8*3=6+24=30
2*(7+5)=2*7+2*5=14+10=24
9*(3+5)=9*3+9*5=27+45=72
6*5+4*5=30+20=50
[2+8]x3=2x3+8x3=24+3=27
2x7+2x5=2x[2+2]=2x3+2x4=4+6=10
3x9+5x9=2x[3+1]=9x1+3x4=5+6=11
[6+4]x5=4x5+4x1=4+8=12