Math Games

Grade 7 - The Number System

Standard 7.NS.1.5 - Practice subtracting fractions with unlike denominators.

Included Skills:

Students will be expected to demonstrate an understanding of adding and subtracting positive fractions and mixed numbers, with like and unlike denominators, concretely, pictorially, and symbolically (limited to positive sums and differences).
• Performance Indicators
- N05.01 Use benchmarks to estimate the sum or difference of positive fractions or mixed numbers.
- N05.02 Model addition and subtraction of given positive fractions or given mixed numbers, using concrete and pictorial representations, and record symbolically.
- N05.03 Determine the sum or difference of fractions mentally, when appropriate.
- N05.04 Determine the sum of two given positive fractions or mixed numbers with like denominators.
- N05.05 Determine the difference of two given positive fractions or mixed numbers with like denominators.
- N05.06 Determine a common denominator for a given set of positive fractions or mixed numbers.
- N05.07 Determine the sum of two given positive fractions or mixed numbers with unlike denominators.
- N05.08 Determine the difference of two given positive fractions or mixed numbers with unlike denominators.
- N05.09 Simplify a given positive fraction or mixed number by identifying the common factor between the numerator and denominator.
- N05.10 Simplify the solution to a given problem involving the sum or difference of two positive fractions or mixed numbers.
- N05.11 Solve a given problem involving the addition or subtraction of positive fractions or mixed numbers, and determine if the solution is reasonable.