Millimeters is a unit of length, not volume. Therefore, either your math teacher asked you a trick question OR Mispelled the millimeters part while meaning milliliters in which case the answer would be 320 ml If your teacher meant Cubic Centimeters it would 320 cc if your teacher meant Cubic Millimeters, I have to write this formula out because otherwise I'll be answering wrong... A millimeter is 1/1000 of a meter. a square millimeter, a measure of area, is one millimeter x 1 milimeter a cubic millimeter, a measure of volume is one millimeter x one mm x 1mm. Now I have to go backward from a liter, which is 1000 cubic centimeters. 1cc is 1 centimeter x 1cm x 1cm. 1 square centimeter equals one centimeter x 1cm. 1 centimeter contains 10 millimeters. Therefore, 1 square Centimeter = 10 millimeters x 10 mm = 100 square mm. 1 cc = 100 square mm x 10 = 1000 cubic mm 320 cc = 0.32 L = 320,000 cmm. To get extra credit, 1 liter weighs 1000 grams, 1 cc weighs 1 gram, 1 cubic millimeter = 1 milligram or 1/1000 of a gram therefore the 0.32 Liters also weighs 320,000 milligrams.
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