Question

7 2/15 - (4 - 3 7/15) + 2 12/15

Answer 1

7 2/15 - ( 4(3 15/15) -3 7/15) + 2 12/15=7 2/15(6 17/15) - 8/15 + 2 12/15 = 6 17/15 - 8/15 + 2 12/15= 6 9/15 + 2 12/15 = 8 21/15 = 9 6/15 = 9 2/5

Answer 2

9 6/15 = 9 2/5, а не 9 2/3

Answer 3

7 2/15 - (4 - 3 7/15) + 2 12/15 = 107/15 - (60/15 - 52/15) + 42/15 =
= 107/15 - 8/15 + 42/15 = 141/15 = 9 6/15 = 9 2/5