Express simple ratios as percents and percents as ratios with denominator 100. Have students order a set of positive and negative numbers. Given a whole number less than 100, a student should be able to identify the number as prime or composite. Students should use rules of divisibility, together with calculators, to test to see if larger numbers are prime. Have students identify the square root of a perfect square.
Students are able to read and name numbers using whole number exponents.
Have children explore ancient numeration systems and the use of different bases, such as 2 and 5. Have children write about ancient numeration systems or the use of the Roman system in today's world. Have children develop the meaning of multiplication and division of whole numbers and decimals. Provide children with a rich variety of models for addition, subtraction, multiplication and division of numbers. Have children explore the relationships among the four basic operations with whole numbers and decimals.