Question

${4}^{ - 2} \div \frac{ - 1}{64}$
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Answer 1

$4^{ - 2} \div \frac{ - 1}{64} = - 4^{ - 2} \times 64 = - 4^{ - 2} \times 4^{3} = - 4^{ - 2 + 3} = - 4^{ - 1} = - 4$