Adding and subtracting on number line
cc-early-math-add-sub-1000--cc-early-math-strategies-for-adding-two-and-three-digit-numbers--exercise-for-numberline-addition-and-subtraction
Addition and subtraction within 1000
Strategies for adding 2- and 3-digit numbers
Sal adds and subtracts numbers like 585 and 368 using a number line. Numbers used in these problems are less than 1000.