Question

what should be added and subtracted :answer step by step ​

Answer 1

Answer:

11. 1/4

12. -1 and 1/15

Step-by-step explanation:

11. Let the number be x

1/3 + 1/4 + 1/6 + x = 1

=> (4 + 3 + 2) / 12 + x = 1

=> 9/12 + x = 1

=> 3/4 + x = 1

=> x = 1 - 3/4

=> x = 1/4

12. Let the number be x

3/5 - x = 5/3

=> -x = 5/3 - 3/5

=> x = 3/5 - 5/3

=> x = (9 - 25) / 15 = -16/15 = -1 and 1/15

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