Using an abacus, show how you can decompose to add 27 + 18.

by Sherry McElhannon | Apr 13, 2023

Not a Member? Register Now! Already a Member? Username or Email Password Remember me Lost your password? Or Visit the Member Home...

Using an abacus, show how you can use compensation to add 58 + 22.

by Sherry McElhannon | Apr 13, 2023

Not a Member? Register Now! Already a Member? Username or Email Password Remember me Lost your password? Or Visit the Member Home...

Using an abacus, show how you can use doubles to add 25 + 26.

by Sherry McElhannon | Apr 13, 2023

Not a Member? Register Now! Already a Member? Username or Email Password Remember me Lost your password? Or Visit the Member Home...

Using an area model, decompose 12 x 9 to find D.C.’s error when multiplying.

by Sherry McElhannon | Apr 20, 2023

Not a Member? Register Now! Already a Member? Username or Email Password Remember me Lost your password? Or Visit the Member Home...

Using an area model, decompose 15 x 3 to find D.C.’s error when multiplying.

by Sherry McElhannon | Apr 20, 2023

Not a Member? Register Now! Already a Member? Username or Email Password Remember me Lost your password? Or Visit the Member Home...