![Measuring for the Art Show - Addition on the Open Number Line (1st Grade)](http://newperspectivesonlearning.com/cdn/shop/products/measuring-art-show_b67f9d49-e9ed-42e4-96ce-dd4c045e4495_{width}x.png?v=1627933181)
Introduces measurement with non-standard units to emerge the open number line model and prepares the way for examining 2-digit numbers, magnitude, number relations, landmark numbers, and addition up to 100. This unit needs to be done BEFORE addition with double digit work starts.