Counting Multiplication Numbers & Operations in Base 10 Place Value

“5 is the same as 50, just with a 0.”


The kid also answered the “How do you know?” question:

“Because 5 is half of 10, and 50 is the same number as 5, just with a 0, and 10 is the same number as 100 just with another 0.”

What does this mistake say about the way kids see numbers and multiplicative relationships?

Counting Number & Operations in Base 10

Kindergarten Counting


(The pretty, blue script is a transcription of the pretty, black script.)

What’s going on here? Is this kid going to do OK in 1st grade? What will the 1st grade teacher have to work with?

Thanks to Christopher Danielson for the submission.