book Maths Puzzle Numerical Ability

Give an example of a sum of a negative number and a positive number that is negative.

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book Other Question

2a+2+6 PLEASE SHOW ME HOW DO I USE FOUR 4'S USING ANY MATHEMATICAL OPERATION.AND YOU MAY USE EXPONETS, FACTIONS, SQUARE ROOTS, DECIMAL POINTS, NEGATIVE NUMBERS, AND FACTORIALS.
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