This is next level thinking: Let’s check: 5.90 − 5.11 = 0.79 So it should be 0.79, not − 0.21. If you got − 0.21 , that would be from solving 5.9 − 5.11

This is next level thinking: Let’s check: 5.90 − 5.11 = 0.79 So it should be 0.79, not − 0.21. If you got − 0.21 , that would be from solving 5.9 − 5.11 = − 0.21