The missing lollies? Subtraction

Which is more?  $1 coins as long as their finger tip to elbow $1 coins as long as their foot{...}

First make some estimations: How many would be too low? How many would be too high? What is your estimation?{...}

Launch: Have a picture of James and Emily’s dinner. Who has  more? How do you know? Explore: Going to a{...}