Emily and Shilpa were looking at some groups of pennies. Emily sees
Who is correct? Why?
Think about what the expression
represents. Try finding the answer on your own before looking at the solution.
Shilpa is correct. Three groups of
pennies plus more pennies is equal to pennies.
Draw a diagram to show the possible arrangement of the pennies. (For help, see Lesson 1.2.1.)
Remember to clearly show the groups and the remaining pennies in your diagram.
Describe what a penny diagram might look like for the incorrect answer given by one of the girls above.
Since Emily thinks there are
pennies, draw a diagram which has groups of .