\
The expression is .
To subtract – 15.4 means add 15.4
(Product of two same signs is positive)
(Add: )
The value of expression is – 2.8. \ \
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.![\"\"](\"/MathKey/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=642ab668729432497832afb8e260991a.png\")
(Product of two same signs is positive)![\"\"](\"/MathKey/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=b489433289e79a3e1e47f1f69651584b.png\")
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