6. (8+ 9) + 10 = 8 + + 10)
7.46 + ( + 4) = (46 + 4) + 50
8.2 345 = 1900 ** 145
9. 12x (8 4 ) = 12 x 8 + 12x2
10. 4. x9 = 12 % = 36
11. (8 x 5) x3 = 8 x (5 x​