K – NS – ID1

Ill-Defined Problems are not optimal for this particular key concept.

K – NS – OE14

Ask students to choose any number from 1 to 10. Students then count backwards.

K – NS – OE15

Name a number. Share a counting sequence that will have that number said right away.

K – NS – OE16

What number is difficult to start counting backwards from. Why?

K – NS – OE17

What number is difficult to start counting forwards from. Why?

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