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Question

(i) $$- 4 \times ( - 2 ) \{ 2 \times ( - 6 ) + 3 \times ( 2 \times 6 ) - 4 - 4 ) \}$$
(ii)$$140 - 12 \times [ 3 - 4 \{ 2 \times \overline { 3 - 2 \times } ( - 8 ) 1 ]$$
(iii)$$- 80 + 6 \times \{ - 3 - 21 + 20 \} + 100$$

Solution
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