Amoeba Game Three levels of difficulty to demonstrate grid multiplication

Multiplication practice 1U x 2 3 4 5          A          B

Multiplication practice TU x 2 3 4 5          A          B

Multiplication practice TU x U          A          B

Multiplication practice TU x TU          A          B

Multiplication practice 1TU x U         A          B

Multiplication practice HTU x U          A          B

Multiplication practice HTU x TU          A          B