N3C4TNp23

Answer to Problem 23: Yes, Jon is correct. 240 ÷ 3 = 80. 3 ÷ 3 = 1. When you add 80 + 1, you get 81. If you divide 243 by 3, you also get 81 also.

TEACHER NOTES:

Having students discuss their solution strategies helps students solidify their understanding and see likenesses and differences between their own strategies and their classmates’. Having students verbalize or write about their thinking gives the teacher a wealth of information regarding a student’s understanding about the concept and about numbers in general.