decimal steps

as far as I'm aware (i) Q4 has two solutions (maybe more):

• A = + 0.2 , B = x 3 , C = x 2
• A = + 0.6 , B = x 3 , C = + 1

decimal steps (ii) Q4 is a tough question: A = x 10 , B = + 2 , C = divide by 5 

these two questions are demamding but some groups of 11 year olds have obtained solutions...