Q&A #522

Teachers' Lounge Discussion: Teaching subtraction

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From: Bonnie <betty@z-link.net>
To: Teacher2Teacher Public Discussion
Date: 1999020413:21:04
Subject: teaching substraction

	In refrence to Teacher2Teacher Service,Teaching subtraction. Before a
child can learn barrowing in subtraction he or she has to know all the
numbers on the top represent 10. In the example you have, to start
with you would have to take one 10 from nine 10's leaving eight 10,s
making the 0 next to the 9 , 10-10s then take one ten from the 10-10s
making the 10-10s 9-10s  the ten you took from the 10-10s goes on the
last 0 making that 10-10s. So now it is 10 - 4 =6  9 -7=2   8-7= 1. 
Now 8-5=3  5-3=2   4-2=2.  This is the best I can explain it for this
example:  458900
                                                         - 235774

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