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From Karnataka Open Educational Resources
Series of Activities on Number Systems (view source)
Revision as of 18:32, 28 January 2013
, 18:32, 28 January 2013→The number line in mathematics
*Arrange a set of randomly chosen positive and negative numbers (integers) along the number line in increasing order.<br>
*Arrange a set of randomly chosen positive and negative numbers (integers) along the number line in increasing order.<br>
==The number line in mathematics==
==Part III: The number line in mathematics==
The number line is not just a school object. It is as much a mathematical idea as functions.
The number line is not just a school object. It is as much a mathematical idea as functions.
The number line is a geometric “model” of all numbers -- including 0 1, 2, 25, 374 trillion, and -5, Unlike counters, which model only counters, the number line models measurement, which is why it must start with zero. (When we count, the first object we touch is called "one." When we measur using a ruler, we line one end of the object we’re measuring against the zero mark on the ruler. <br>
The number line is a geometric “model” of all numbers -- including 0 1, 2, 25, 374 trillion, and -5, Unlike counters, which model only counters, the number line models measurement, which is why it must start with zero. (When we count, the first object we touch is called "one." When we measur using a ruler, we line one end of the object we’re measuring against the zero mark on the ruler. <br>
