Give the property used in each equation. Then, write the missing

numbers.

1) (6 + 12) + ( 5 + 7) = ( 5 + __) + ( __ + 12) : ____________________

2) ( 7 x 6 ) x 5 = __ ( 6 x __ ) : ____________________

3) 20 + __ = 40 + ___ : ___________________

4) 24 + ( 36 + 50) = ( _ + _ ) + 50 : ___________________

5) 7 x ( 10 + 5 ) = ( __ x 10 ) + ( 7 x __ ) : ___________________

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