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Welcome
to the Teachers' Choice Software web site.
Our
FREE on line mathematics
'How-To' library is open 24 hours a day.Â
The ever-growing library
now has 71 helpful topics, and every topic includes a free download!
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The Algematics 'change sign' command changes the sign terms of
expressions or equations, effectively multiplying each one by -1.
Example : Click 
once:
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