K – PN – PP31

If the whole is 5 and one part is 2, what is the missing part?

K – PN – PP32

If the whole is 3 and one part is 1, what is the missing part?

K – PN – PP1

Does the total count remain the same if 4 is broken into 1 and 3? Explain.

Subscribe To Our Newsletter

Join our mailing list to receive the latest news and updates from Dr. David Costello.

You have successfully subscribed!