These questions are a bit hard and I would like help from anyone really = 2.9+6 2/5, 16 3/4 + 8.25, 3 1/2 - 2/5, and 3 1/4 + 3/25 . If you could help I'd appreciate it very much < 3

Me because some of question i don’t understand

Order the measurements from the least to the greatest. 2,720 ml , 24.91 l , 0.0268 kl

If m∠abc = 70°, what is m∠abd? justify your reasoning.  using the addition property of equality, 40 + 70 = 110, so m∠abd = 110°.  using the subtraction property of equality, 70 − 30 = 40, so m∠abd = 30°.  using the angle addition postulate, 40 + m∠abd = 70. so, m∠abd = 30° using the subtraction property of equality.  using the angle addition postulate, 40 + 70 = m∠abd. so, m∠abd = 110° using the addition property of equality.