Answer:
c
Step-by-step explanation: If you do the math you can clearly see and I got the answer correct.
Answer:
2
Step-by-step explanation:
423 = 100 + 100 + 100 + 100 + 10 + 10 + 3
hope this helps
I really don't know how toowrk it out on paper, I'm afraid. I just looked at it, and somehow knew that the answers are 7 and 9.