Please help! Partitioning - maths

[Saxy]

My DS has come home with his homework and obviously did not listen in class today and I am sure this is really easy but I don't know what this means in terms of maths.

The question is double the following numbers 84, 78 etc but remember to partition them before doubling......

What does this mean?

HELP!

Partitioning means separating the units, tens (and hundreds).

It is a way of getting children to understand that the '8' in '84' is not actually the number 8, but denotes 8x10 =80.

So for the first sum he needs to draw a vertical line between the 8 and the 4, to shoe he understands this and to help with the maths.

It is then just a case of 2 x 80 = 160.

2x 4 = 8.

160 + 8 = 168.

I'll let you do the rest yourself.

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partitioning is
(84)= 80 + 4

(237) = 200 + 30 + 7

(3576) = 3000 + 500 + 70 +6

its breaking the number down into Hundreds, tens, units