The number z and −1.9 are additive inverses.

Drag and drop −1.9 and z to their correct positions on the number line.

Drag and drop the label “Sum” to the sum of −1.9 and z.

The number z and 19 are additive inverses Drag and drop 19 and z to their correct positions on the number line Drag and drop the label Sum to the sum of 19 and class=