Question

18 ×(-3) +21and18 ×[(-3) +21]​

Answer 1

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$18 \times ( - 3) + 21 \: and \: 18 \times{ ( - 3) + 21)}$

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$⇛18 \times - 3 + 21$

$⇛ -54 +21$

$⇛ -33$

Now solving second part:-

$18 \times ( - 3 + 21)$

$18 \times 18$

$⇛324$

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