Ariana subtracts 38 - 16 on the Cranmer Abacus. She uses the Rule of Five for this process. She finds the correct answer of 22.

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2/1/2013

Ariana adds 42 + 57. She reads the problem from her worksheet, written in Nemeth. She uses the "Rule of 4" for her exchanges and arrives at the correct answer 99. She records her answer on the Perkins Braillewriter in correct Nemeth Code. You can see she is still uncertain about the Nemeth but her "guess" was right.

18

2/1/2013

Rosa adds 32.2 + 31.08. This is an easy problem and she did much harder ones later in the week.

4

2/1/2013

Adriana is just beginning to add values with decimals. Here she adds 32.2 + 31.08.

Original contributor Margaret Edwards

2

1/29/2013