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First i worked out sixteen,by timesing four by four then adding four and taking
four away.Next i did zero,i did four add four take away four take away four.
I did two which was bracket four divide by four bracket add bracket four
divide by four.Seven was four add four take away bracket four divide by four bracket.Fithteen was four times four take away bracket four divide by four bracket.Nine was four divide by four add four add four.

I thort that sixteen and zero were really easy two and seven were okay but nine was quite hard!