5nf5b Worksheets
Number and Operations—Fractions
Apply and extend previous understandings of multiplication and division to multiply and divide fractions.
5Interpret multiplication as scaling (resizing], by:
bExplaining why multiplying a given number by a fraction greater than 1 results in a product greater than the given number (recognizing multiplication by whole numbers greater than 1 as a familiar case]; explaining why multiplying a given number by a fraction less than 1 results in a product smaller than the given number; and relating the principle of fraction equivalence a/b = (n×a)/(n×b) to the effect of multiplying a/b by 1.
5nf5b
5nf5b
- Estimate the product of two fractions without doing exact multiplication.
- Round fractions to easy benchmark fractions like 0, 1/2, 1, or whole numbers to make mental math quicker.
- Use compatible numbers to get a close estimate for a fraction multiplication problem.
- Decide which estimate makes the most sense by comparing it to the answer choices.
