I. From the middle of the 2nd grade section of Hamilton's Essentials of Arithmetic (published in 1919), p. 50 [click to enlarge]:
II. From the middle of the 2nd grade (TERC) Investigations curriculum, assigned in early February [click to enlarge]:
III. Extra Credit:
Which involves higher-level thinking: doing nine word problems mixing up the four basic operations of arithmetic, or "making a representation"?