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# AdditiveArithmetic Implementations

## Topics

### Operators

[`static func + (Size3DFloat, Size3DFloat) -> Size3DFloat`](/documentation/Spatial/Size3DFloat/+(_:_:))

Returns a size that’s the element-wise sum of two sizes.

[`static func += (inout Size3DFloat, Size3DFloat)`](/documentation/Spatial/Size3DFloat/+=(_:_:)-7eiud)

Calculates the element-wise sum of two sizes and stores the result in the left-hand-side variable.

[`static func - (Size3DFloat, Size3DFloat) -> Size3DFloat`](/documentation/Spatial/Size3DFloat/-(_:_:))

Returns a size that’s the element-wise difference of two sizes.

[`static func -= (inout Size3DFloat, Size3DFloat)`](/documentation/Spatial/Size3DFloat/-=(_:_:)-9s57n)

Calculates the element-wise difference of two sizes and stores the result in the left-hand-side variable.

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