Question

subtract the integers without a calculator.
$-1 - 18$

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subtract the integers without a calculator.
$-3 - (-1)$

Explanation:

Step1: Rewrite as addition of negative

$-1 - 18 = -1 + (-18)$

Step2: Sum the negative values

$-1 + (-18) = -(1+18) = -19$

Step3: Rewrite subtraction of negative

$-3 - (-1) = -3 + 1$

Step4: Compute the final sum

$-3 + 1 = -(3-1) = -2$

Answer:

$-19$
$-2$