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dimples056
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$1.00 Students questions about math

• From Mathematics: General-Mathematics
• Closed, but you can still post tutorials
• Due on Jan. 16, 2009
• Asked on Jan. 16, 2009 at 12:53:36AM

Q:

A seventh-grade student does not believe that –5 < –2. The student argues that a debt of $5 is greater than a debt of $2. How do you respond?

A student says that his father showed him a very simple method for dealing with expressions like –(a – b + 1) and x – (2x – 3). The rule is, if there is a negative sign before the parentheses, change the signs of the expressions inside the parentheses. Thus, –(a – b + 1) = –a + b – 1 and x – (2x – 3) = x – 2x + 3. What is your response?

 

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