Math  201819
1.5  Magnitude
The student, given a familiar problem situation involving magnitude, will
a) select a reasonable order of magnitude from three given quantities: a onedigit numeral, a twodigit numeral, and a threedigit numeral (e.g., 5, 50, 500); and
b) explain the reasonableness of the choice.
Adopted: 2016
BIG IDEAS
 So I can learn to estimate with reasonable numbers, for example, if I get a book from the library, does it have 1, 10 or 100 pages
 So that I can learn to understand that the weight of an elephant weighs 500 pounds, not 5 or 50
 So that I can learn that my school has 400 students not 4 or 40
UNDERSTANDING THE STANDARD
 Magnitude refers to the size of a set.
 Exploring ways to estimate the number of
objects in a set, based on appearance (e.g., clustering, grouping, comparing),
enhances the development of number sense.
 To estimate means to determine a number that is close to the exact amount. When asking for an estimate, teachers might ask, “About how much?” or “About how many?” or “Is this about 10 or about 50?”
 Students should be provided opportunities to estimate a quantity, given a benchmark of 10 and/or 100 objects.
ESSENTIALS
The student will use problem solving, mathematical communication, mathematical reasoning, connections, and representations to

KEY VOCABULARY
Updated: Aug 22, 2018