15-01-2017
Mathematics

contestada

9s - 5s + 2s - s
Please explain how you did this question.

Respuesta :

cathy33 cathy33

15-01-2017

Just add them as if it were normal then put the s behind it

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15-01-2017

Just take out the s' to make it easier
So 9-5+2-1
9-5= 4
4+2=6
And then +1 is 7
And all you have to do is put the s back in so the answer is:
7s

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