[SENco-forum] Maths

Tim Rupp <tgrupp at ntlworld.com> wrote:

Learning 11 & 12 times tables seems fairly pointless when you can teach that 
10 time a number plus 2 times a number make 12 times a number and they can 
do it faster than finding the answer using the 12 times table (e.g 12 X 147)

As a child of the pre-decimal  era I learned my tables, by rote, up to 12 x12.  I don't ever recall being expected to work out a sum like 12 x 147 by using the 12 times  table.  We did it in exactly the way you describe, multiplied the number by 2, then by 10 and added the two results together.  No change there, then? We called it long multiplication.  

On the other hand, I don't have to do that rather tedious operation when multiplying 12 x 12

Maggie

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