Teacher2Teacher 
Q&A #522 
View entire discussion [<< prev] [ next >>]
From: raj To: Teacher2Teacher Public Discussion Date: 2001062506:55:48 Subject: subtraction from zeroes aneasier way to subtract from zeroes is described here which eliminates the confusion of borrowing: ex: 24000  12345  assume first 0 to be 10.subtrract 5 from this 10 and get 5.add 1 to 4 and make it 5.again assume next zero as 10 and subtract 5 from new 10.now add 1 to number '3' and make it 4.subtract this 4 from next zero which is assumed as zero.now add 1 to number '2'and make it '3'.subtract this 3 from number 4 and get 1.last number can be subtracted in usual manner.the process can be shown as follws: 2 4 0(10) 0(10) 0(10)  1 2(+1) 3(+1) 4(+1) 5  1 1 6 5 5 this method can also used to subtract any bigger number from lower number starting from unity which is asuumed a tens number.hope it works with your students.
Post a reply to this message

[Privacy Policy] [Terms of Use]
Math Forum Home 
The Math Library 
Quick Reference 
Math Forum Search