- 3 - (-7) = -3 + ____
To subtract a negative number, we can change it to addition and change the sign of the number.
Therefore, the equation becomes -3 + 7 = 4.
- 4 - 2 = ____ + (-2)
To find the missing value, we can add 2 to both sides of the equation.
Therefore, the equation becomes -4 - 2 + 2 = ____ + (-2) + 2, which simplifies to -4 = ____.
- 3 - ( - 7 ) = - 3 + ____
- 4 - 2 = ____ + ( -2 )
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