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Question
match the equivalent expressions, then find their values. start with just the first expression. you can rewrite 18 - (-7) as an equivalent addition expression by adding the additive inverse of -7. fill in the additive inverse of -7 to complete an equivalent addition expression.
18 - (-7) -18 + 7 18 + -7
18 + \square
Step1: Definir inverso aditivo
El inverso aditivo de un número \( a \) es \( -a \), tal que \( a + (-a)=0 \). Para \( -7 \), su inverso aditivo es \( 7 \), ya que \( -7 + 7 = 0 \).
Step2: Reescribir la resta como suma
La propiedad de la resta es \( a - b = a + (-b) \), pero aquí \( b=-7 \), así que \( 18-(-7)=18 + (\text{inverso aditivo de } -7) \). Como el inverso aditivo de \( -7 \) es \( 7 \), entonces \( 18-(-7)=18 + 7 \).
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