Warm up with a Mystery Math Mistake to add 2 two-digit numbers. Measure the length of objects and sides of shapes in inches. Notice and Wonder to compare centimeters and inches. Find objects that are about 1 inch long.
Warm up with a Mystery Math Mistake to figure out what went wrong when adding two 3-digit numbers. Subtract within 1,000 using a number line and compensation and decompose strategies.
