Grade 7 math printable worksheets, online practice and online tests. Answer Key For The California Mathematics Standards Grade 7 Number Sense 1.0: Students know the properties of, and compute with, rational numbers expressed in a variety of forms. NS 1.3: Students convert fractions to decimals and percents and use these representations in estimations, computations, and applications. a. Complete the table Interactions and Ecosystems Key 1. Living things have basic needs. Throughout the first topic in this unit the needs of living things were examined in depth. The four basic needs of living things are: A. food, clothing, shelter, love B. food, water, habitat, space C. water, air, habitat, protection D. air, water, food, habitat (SF p. Secondary Math 1 Unit 9 Review Answer Key 1. The sample is the group of 100 donors from the population of all donors. The sample statistic is the mean donation of the group of 100 donors and the population parameter is the mean donation of all donors. 2. mean: 4.9, median: 4.8, mode: 4, range: 6, standard deviation: 1.8 3. d 4. c 5. a 6. d 7. b ... 1 . Mathematics | Grade 7 . In Grade 7, instructional time should focus on four critical areas: (1) developing understanding of and applying proportional relationships; (2) developing understanding of operations with rational numbers and working with expressions and linear equations; (3) solving problems