 |
| ||
| |||
|
| Math Central | Quandaries & Queries |
|
Question from Beth, a parent: Estimate using compatible numbers: 2 X 3978 = 102/25 = |
Beth,
When working with "compatible" numbers, you generally round things off to make the arithmetic easy.
For example, 19 x 202 is about 20 x 200 which is easy: 4000.
The accurate answer for 19 x 202 is 3838, so 4000 is a reasonable estimate.
Another example: 17/63 is about 16/64 which cancels down easily to 1/4.
Cheers,
Stephen La Rocque.
| ||
| ||
| ||
 |
 |
|
Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences.