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generating equivalent forms of whole numbers
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generating equivalent forms of whole numbers
Standard 1: Number, Number Sense and Operations
Mental math and estimation skills are important in not only number operations and number sense, but also in the other areas of the GED Mathematics Test. When you estimate, you use your number sense to find an answer or to check the reasonableness of an answer. This will require that you teach students to round numbers up and down, as well as to identify acceptable ranges when estimating.
Computational fluency--having and using efficient and accurate methods for computing--is essential. Students should be able to perform computations in different ways, including mental calculations, estimation, and paper-and-pencil calculations using mathematical sound algorithms. Computational fluency should develop in tandem with understanding. (Principles and Standards for School Mathematics: An Overview, NCTM)
Number pervades all areas of mathematics. Students with number sense naturally decompose numbers, use particular numbers as referents, solve problems using the relationships among operations and knowledge about the base-ten system, estimate a reasonable result for a problem, and have a disposition to make sense of numbers, problems, and results. For example, children in the lower elementary grades can learn that numbers can be decomposed and thought about in many different ways--that 24 is 2 tens and 4 ones and also two sets of 12.
- generating equivalent forms of whole numbers