N3B2TNp11
Answer to problem 11:
I would take the largest number, 19, and double it to get 38. But then I need to minus one because 18 is one less than 19, so that gives me 37.
DEFINITION:
demonstrate fluency—demonstrate fluency means that students are able to compute efficiently and accurately with single-digit numbers.[1]
[1] National Council of Teachers of Mathematics. (2000). Principles and standards for school mathematics (p. 84). Reston, VA: Author.