by Peg Nazari Marson (Illustrator), Ronald Jay Marson (Author)

TOPS Learning Systems, More Metrics 36. How much is a hectoliter? Who cares? This book teaches only those metric units that are important - meters, grams and liters - plus 6 useful derivatives. Play Metric Rummy. Build an amazingly sensitive straw balance sensitive to just 1 milligram. Learn to estimate to the last uncertain digit for measuring accuracy.