Sizing Up the Universe
12 Habits of Mind
Computation and Estimation
For Grades: 6-8
Learning Goal 1a
Find what part one number is of another and express it as a fraction or a percentage.
Learning Goal 1b
Find what number is a given percentage of another number.
Learning Goal 2
Use, interpret, and compare numbers in several equivalent forms such as integers, fractions, decimals, and percents.
Learning Goal 3
Calculate the circumferences and areas of rectangles, triangles, and circles, and the volumes of rectangular solids.
Learning Goal 4
Find the mean, median, and mode of a set of data.
Learning Goal 5
Estimate distances and travel times from maps and the actual size of objects from scale drawings.
Learning Goal 6
Insert instructions into computer spreadsheet cells to program arithmetic calculations.
Learning Goal 7a
Use the units of the inputs to a calculation to determine what units (such as seconds, square inches, or dollars per tankful) should be used in expressing an answer.
Learning Goal 7b
Convert quantities expressed in one unit of measurement into another unit of measurement when necessary to solve a real-world problem.
Learning Goal 8
Decide what degree of precision is adequate and round off the result of calculator operations to enough significant figures to reasonably reflect those of the inputs.
Learning Goal 9
Express numbers like 100, 1,000, and 1,000,000 as powers of ten.
Learning Goal 10
Estimate probabilities of outcomes in familiar situations on the basis of history or the number of possible outcomes.