Question

efectueaza in doua moduri:5*(5+2), 8*(6-3) ,(2+4)*9,(5-3)*6,(3+2+4)*10,(5+1+2)*9,8*(7-3),10*(4+3-2)

Answer 1

(2+4)×9=6×9=54
(2+4)×9=2×9+4×9=18+36=54

(5-3)×6=2×6=12
(5-3)×6=5×6-3×6=30-18=12

(3+2+4)×10=9×10=90
(3+2+4)×10=3×10+2×10+4+10=30+20+40=90

(5+1+2)×9=8×9=72
(5+1+2)×9=5×9+1×9+2×9=45+9+18=54+18=72

8×(7-3)=8×4=32
8×(7-3)=8×7-8×3=56-24=32

10×(4+3-2)=10×5=50
10×(4+3-2)=10×4+10×3-10×2=40+30-20=70-20=50