happyandhealthy:sorry for typo error. it shd be like what ksi assumed. 5 baskets, 8 eggs. thanks for pointing out.hi ksi thanks for your detailed explanation. I can now understand. I used to tell my son there's no difference between the 2 number sentence as you get the same answer ultimately. guess I have to be more careful.thanks again for your great help. You are welcome happyandhealthy. This is where our kids learn the exam-paper smart part if a child is already very smart in knowing the commutative law or for advanced kids.If it is a worksheet or topical test or the year they are being tested for the learning concepts of x groups of y, then they have to be careful which one comes first. After bypassing that stage, it is fine. In other words, come PSLE, this would no longer be an issue.