Teaching in Room 9. Open Number Lines 2 | 2nd Grade Math. Special | 28m 38s Video has Closed Captions | CC. Addition & subtraction strategies to solve two-digit equations using an open number line.

We're gonna use our area model to solve that. Nine times 10 and nine times two. ... Awesome job, third grade math mights, we have one more number line to label. I'm just curious, ...