## 11 Mar 2013

### Numbers Squared, Indices and Times Tables: Maths Age 7-10

This is a way to begin learning indices (to the power of two, squared) and square roots that I did with my son - which works.
He's learning his times tables at the moment. He knows 2x, 3x, 5x, and 10x well and is currently working on 4x, 6x, 8x and 9x.

For a change to working on 'the times tables', we decided to solve these, which we set out, like this, in his book (answers not supplied to him):
1 x 1 =  (2)
2 x 2 =  (4)
3 x 3 =  (9)
4 x 4 =  (16)
5 x 5 =  (25)
6 x 6 =  (36)
7 x 7 =  (49)
8 x 8 =  (64)
9 x 9 =  (81)
10 x 10 =  (100)
11 x 11 =  (121)
12 x 12 =  (144)
Those marked in purple are the ones he did easily. I helped him with 6x6, 7x7 and 8x8, linking it to the work we've already done on the 6x, 7x, and 8x tables. I told him the answer to 11x11 and 12x12.

Then we set the answers out in order.
2   4   9   16   25   36   49   64   81   100   121   144

He 'chanted' them, then we tested (in the order above) until he could remember them in sequence.

So, in order:
2   4   9   16    25    36   49   64   81    100   121   144

Then I set him a challenge. Could he work out the answers to the other questions, based on what was written below:

2  =
4  =
9 =
16 = 4
25 =
36 =
49 =
64 =
81 =
100 = 10
121 =
144 =

√ is 'square root of'
Find out more about square roots here.