Deriver X/÷

Uses strategies, patterns, de/composition (12 x 2 = 10 x 2 + 2 + 2) and derived combinations, such as multiplying x 9 as 10 – 1 or 7 x 8 from 7 x 7 + 7. Solves multidigit problems by operating on tens and ones separately. Quantitatively predicts the effects of changes in the number of people sharing one the size of the shares.

Activities

You may see this:

Linked Image to Sign In/Sign Up page

Other Examples:

  • Child says, “7 X 6, five 7s is 35, so 7 more is 42.”

Help your student become a(n) Deriver X/÷

These activities challenge children to solve  multiplication problems using flexible strategies that go beyond skip counting to include some know facts. For example,“7 X 7 is 49, so 8 X 7 is one more 7…56." Encourage children to create, learn, discuss, and use variety of strategies.

Multiplication Relation
Multiplication Relation

Small Group

Tiling Tetrominoes [mult/divide]
Tiling Tetrominoes [mult/divide]

Hands-on Math Center

Special Thanks To

Institute of Education Sciences
The research reported here was supported by the Institute of Education Sciences, U.S. Department of Education, through grant numbers R305K050157, R305A120813, R305A110188, and R305A150243. to the University of Denver. The opinions expressed are those of the authors and do not represent views of the Institute or the U.S. Department of Education.
Bill & Melinda Gates foundation
Heising Simons foundation