N1D4TNp13

 

Answer to Problem 13: Answers may vary. Examples: 6 + 30; 12 + 24; 18 + 18; 6 + 6 + 6 + 6 + 6 + 6

 

 

TEACHER NOTES:

 “Throughout their study of numbers, students in grades 3–5 should identify classes of numbers and examine their properties.”[1]


 

[1] National Council of Teachers of Mathematics. (2000). Principles and standards for school mathematics (p. 151). Reston, VA: Author.