The decimal numeral system has ten as its base. It is the most widely used numeral system, perhaps because a human usually has four fingers and a thumb on each hand, giving a total of ten digits over both hands. A student will need to learn about decimal notation, how to convert decimals to fractions and vice-versa, and how to work with percentages.

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Active Filters: 9th grade (Ages 14-15)
Math 2 Flipper
from Christopher Lee Publications
for 6th-12th grade
in Math Flippers (Location: MATR-FLIP)