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[null,null,"Teacher Name"]
[null,null,"Class/Project"]
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[null,null,"Addition/Subtraction Board"]
[null,null,"Put the problem number first. Then put the addition or subtraction symbol. "]
[null,null,"To assist with addition and subtraction, line the digits in the ones column first. "]
[null,null,"Then add or subtract. Use the gray box to regroup."]
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