Joel’s Math Aha! Moment
Masih di pengurangan 9, tapi sudah siap-siap masuk gigi 4, melaju ke pola pengurangan yang lain.
Why? Because Joel got his another Aha! moment with -9 subtraction. I could tell that he had already mastered this topic. Subtraction with 9 is special and I was more than glad that he didn’t scared by the big number of 100 or even 1.000.
Posted: February 11th, 2010 under First Grade.
Comments: none

