[The following item appeared in the "From the File" section of The ARITHMETIC TEACHER, October 1983, p. 53. Later it was referenced in other NCTM publications.] Here is a novel activity that can be used with selected dates—for example, March 27, 1981—which might be introduced to the class in the following way: “Today is a [...]
Problem Set I Separate each group of numbers into TWO smaller groups so that the sum of the numbers in each of the small groups is the same. NOTE: there may be more than one way to do a problem. If so, can you find the other ways? a) {3, 7, 9, 13} f) [...]