if x and y are two positive numbers then (x)+(y)= x+y
a)10-(-4)= ___+___
=___+___
b)8-(-13)=_______
=_______
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if x and y are two positive numbers then (x)+(y)= x+y
a)10-(-4)= ___+___
=___+___
b)8-(-13)=_______
=_______
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