Question

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Answer 1

3 ) solution

3 × 5 / 25g

3 / 5g

4 ) solution

3 ( - 5 ) / 7g / - 5 / 12 × ( 12 / 4g )

3 ( - 5 ) / 7g / 5 - / 12 × ( 12 / 4g )

3 ( - 5 ) / 7g / - 5 × 12 / 12 × 4g

3 ( - 5 ) / 7g / - 5 / 4g

3 ( - 5 ) × 4g / 7g ( - 1 ) × 5

- 3 × 4 / - 7

3 × 4 / 7

12 / 7

5 ) solution

5 / 15 + 12 / 15 + - 1 / 4

5 + 12 / 5 + - 1 / 4

17 / 15 + - 1 / 4

17 / 15 - 1 / 4

68 / 60 - 15 / 60

68 - 15 / 10

53 / 60

Answer 2

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