Subtracting larger numbers in your head is not always easy, so you can use the column method to take one number away from another. You write the larger number above the smaller number, so that the ...

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 ...

(gentle music) (bells chime) (animation boings) (animations screeching) - [Children] Math Mights. - Welcome back, Math Mights. Are you ready to have some fun with me doing math? My name is Mrs.