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I will give an example.1) You pretend like the last two digits of the two numbers are not there. In this case you would do 400 plus 300 equals 700. Then move on:90 plus 30 equals 120. 8 plus 7 equals 15. Then add the numbers together.
PARTIAL SUMS398+ 437
______
700
120
+ 15
835
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Is 4 over x plus 3 over y equals 2 linear or nonliner?
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