Fill in the blanks :
`(i) 80 div (……..) = - 5 `
`(ii) (-84) div (……..) = - 7 `
`(iii) (……) div (-5) = 25`
`iv) (……….) div 372 = 0 `
`(v) (………) div 1 = - 186 `
`(vi) (………) div 17 = - 2`
`(vii) (………) div 165 = - 1 `
`(viii) (…….) div (-1) = 73 `
`(ix) 1 + (......... ) = - 1`

Answer

Let's solve each part of the question step by step.

### Solution:

**(i)** \( 80 \div (……..) = -5 \)

To find the missing number, we can rearrange the equation:
\[ 80 = -5 \times (?) \]
Dividing both sides by -5:
\[ ? = \frac{80}{-5} = -16 \]
So, the answer is **-16**.

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**(ii)** \( (-84) \div (……..) = -7 \)

Rearranging gives:
\[ -84 = -7 \times (?) \]
Dividing both sides by -7:
\[ ? = \frac{-84}{-7} = 12 \]
So, the answer is **12**.

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**(iii)** \( (……) \div (-5) = 25 \)

Rearranging gives:
\[ ? = 25 \times (-5) = -125 \]
So, the answer is **-125**.

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**(iv)** \( (……….) \div 372 = 0 \)

For any number divided by a non-zero number to equal zero, the numerator must be zero:
\[ ? = 0 \times 372 = 0 \]
So, the answer is **0**.

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**(v)** \( (………) \div 1 = -186 \)

Rearranging gives:
\[ ? = -186 \times 1 = -186 \]
So, the answer is **-186**.

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**(vi)** \( (………) \div 17 = -2 \)

Rearranging gives:
\[ ? = -2 \times 17 = -34 \]
So, the answer is **-34**.

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**(vii)** \( (………) \div 165 = -1 \)

Rearranging gives:
\[ ? = -1 \times 165 = -165 \]
So, the answer is **-165**.

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**(viii)** \( (…….) \div (-1) = 73 \)

Rearranging gives:
\[ ? = 73 \times (-1) = -73 \]
So, the answer is **-73**.

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**(ix)** \( 1 + (......... ) = -1 \)

Rearranging gives:
\[ ? = -1 - 1 = -2 \]
So, the answer is **-2**.

### Summary of Answers:
1. -16
2. 12
3. -125
4. 0
5. -186
6. -34
7. -165
8. -73
9. -2