Write the digits 0,1,2,3,4,5,6,7,8 and 9 in the order and insert '+' or '-'between them to get the result:- a)5 b)-3
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a)   0+1-2+3-4+5-6+7-8+9=0+1+3+5+7+9-2+4+6+8=25-20=5b) 0-1-2+3+4-5+6-7+8-9=0+3+4+6+8-1+2+5+7+9=21-24=-3
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