regrouping + and
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Casey BenjaminEDU 620Fall 2010
AdditionSubtracti
on
Add the ones place Regroup (carry) if
necessary Add the tens place Regroup (carry) if
necessary Continue the same
process to the highest place value.
Borrow if necessary, subtract one from the tens column, add 10 to the top ones
Write the regrouped tens above the tens column
Subtract the ones place Continue the same
process to the highest place value.
326+ 179
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theteachersguide.com
642 - 387
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Additionhttp://www.dositey.com/addsub/
add5ar.html Subtraction
http://www.dositey.com/2008/addsub/subra4.htm
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