Question

78+77+76-75-74-73+72+71+70-69-68-67+.+6+5+4-3-2

Answer 1

78+77+76-75-74-73+72+71+70-69-68-67+.+6+5+4-3-2

=(78+77+76-75-74-73)+(72+71+70-69-68-67)+.+(6+5+4-3-2-1)+1

=9+9+……+9+1

=9×13+1

=117+1

=118

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