01/25/2021 Math Mights Add 2-Digit Numbers Season 3 Episode 304 | 15m 59sVideo has Closed Captions| CC Join Mrs. Markavich for a word problem with her friend Professor Barble!

Quiz: Subtraction with up to 4-digit numbers Complete this quiz to understand how to subtract with up to four-digit numbers. Then put your knowledge to the test.

The present paper describes the success, the methods (mental, informal written, standard algorithm) and the strategies of informal written arithmetic to be observed when 300 elementary students worked ...