If i subtract 123,456,789,123 - 456,908,123,567,435 = ? what is the answer

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43lbs of tomatos cost $387. how much would 41lbs cost

Isabelle is mixing red and blue paint to make purple paint she adds 3/10 of a fluid ounce of red to 12/25 of a fluid ounce of blue to make 1 1/30 fluid ounces of purple how many fluid ounces of red paint ounces of red paint will she need to make 3 fluid ounces of purple paint