Q&A #522

Teachers' Lounge Discussion: Teaching subtraction

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From: Bonnie

To: Teacher2Teacher Public Discussion
Date: 1999020412:21:04
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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