Grade+Five+NS+2.1

2.1 Add, subtract, multiply, and divide with decimals; add with negative integers; subtract positive integers from negative integers; and verify the reasonableness of the results. // 1. The sum of negative _ _ _ and negative _ _ _ is negative _ _ _. //

// 2. The sum of negative _ _ _ and positive _ _ _ is positive _ _ _. //

// 3. The sum of negative _ _ _ and positive _ _ _ is negative _ _ _. //

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