Find the value of the following using properties.
$(- 22) - (+ 15) + (- 72) - (- 17) + (- 20)$

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Solution

$(- 22) - (+ 15) + (- 72) - (- 17) + (- 20) = - 22 - 15 - 72 + 17 - 20$
By arranging both the positive terms and negative terms together we get,
$= - 22 - 15 - 72 - 20 + 17$
$= - 129 + 17$
$= - 112$
Hence, $(- 22) - (+ 15) + (- 72) - (- 17) + (- 20) = - 112 .$

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