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please use the draw tool and write this out

|dw:1359404852432:dw|

|dw:1359404940241:dw|

sometimes it helps to make the other number a fraction to like this

|dw:1359405028812:dw|

you could even put a 1 under the seven|dw:1359405124046:dw|

|dw:1359405345652:dw|
do you see what I did

|dw:1359405321919:dw|

|dw:1359405371767:dw|

yeah sorry I forgot the x so it would be 3x

|dw:1359405668580:dw|
Now you can reduce the fraction 12/4 and the fraction 4/2 before going on.

|dw:1359405770394:dw|
And I did this, is this correct?

12/4 = 3/1 = 3
4/2 = 2/1 = 1
So:
|dw:1359405772980:dw|

And finally:
|dw:1359406000506:dw|

Oh my gosh, thank you!!

You're welcome.

|dw:1359406535113:dw|

|dw:1359406827973:dw|

|dw:1359406928264:dw|

how you make the 40 a ten and 40 a 20?

Ok, that makes sense.