Book 1Â – Counting the Rectangle and its Factors
Books 2, 3, 4Â – Counting the Rectangle Plus Some
Books 5, 6, 7Â – The Rectangle Plus Some and the Total Amount
Books 8, 9, 10Â – Finding the Missing Information
Anna's Math Page – Mortensen Math and More
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Book 1Â – Counting the Rectangle and its Factors
Books 2, 3, 4Â – Counting the Rectangle Plus Some
Books 5, 6, 7Â – The Rectangle Plus Some and the Total Amount
Books 8, 9, 10Â – Finding the Missing Information