Fraction Operations
ND State Standard
7.NO.O.2 Add, subtract, multiply, and divide non-negative fractions in multi-step problems, including authentic problems.
Nonnegative - either positive or equal to zero.
Goal:
Build as few fraction statements as possible to satisfy each constraint at least once.
Each addition must contain at least two (two or more) fractions.
Equation format:
Start with at least two (two or more) fractions.
Use parentheses to indicate the order of operations you'd like to include.
Combine the fractions using addition (+), subtraction (-), multiplication (x), or division (/)
Include an equal sign (=) and the final result.
Constraints:
A. Mixed Operations and Unequal Denominators:
Create a statement where you use at least two different operations (addition, subtraction, multiplication, division) and the final result involves fractions with different denominators.
B. Equivalence through Multi-Step Operations:
Show that two seemingly different fractions are equivalent by using a series of operations that ultimately lead to the same result.
C. Whole Numbers and Improper Fractions:
Start with an expression involving fractions and use operations to end up with a result greater than 1 (a whole number) that can also be expressed as an improper fraction.
D. Factoring Denominators with Mixed Operations:
Create a statement where the denominator of one fraction is a factor of the other's denominator. Use a combination of operations to arrive at the final result.
E. Multi-Step Operations with Sum > 1:
Show a multi-step statement involving fractions where the final result is a sum greater than 1.
F. Multi-Step Operations with Sum < 1:
Create a statement using various operations with fractions where the final result is a sum less than 1.
G. Reaching a Whole Number with Multi-Step Operations:
Start with an statement involving fractions and use a combination of operations to end up with a whole number as the final result.
H. Multi-Step Operations with Sum < 1/2:
Develop a multi-step statement with fractions where the final result is a sum less than one-half.
Make sure that you are showing all your work for each step, do not turn your fractions into decimals, I want to see your fractional work.
Describe how and why you built each statement.
Be sure to identify which statements satisfy which constraints.
Which constraints pair nicely?
Which constraints cannot be paired?
Is it possible to solve all constraints using 2, 3, or 4 fraction statements?