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 7th Grade Number Sense:  Standards and Practice Problem(s) Mathcasts/ ExamView 7NS.1.0 Students know the properties of, and compute with, rational numbers expressed in a variety of forms: 7NS.1.1 Read, write, and compare rational numbers in scientific notation (positive and negative powers of 10) with approximate numbers using scientific notation.       Note: If you watch Bruce's VoiceThread you'll notice that the ink keeps disappearing.  To prevent this you have to click on the center circle in the color wheel one or more times. Ready 7NS.1.2 Add, subtract, multiply, and divide rational numbers (integers, fractions, and terminating decimals) and take positive rational numbers to whole-number powers. Ready 7NS.1.3 Convert fractions to decimals and percents and use these representations in estimations, computations, and applications. Ready 7NS.1.4 Differentiate between rational and irrational numbers. 7 NS 1.4  Ready 7NS.1.5 Know that every rational number is either a terminating or repeating decimal and be able to convert terminating decimals into reduced fractions. Ready 7NS.1.6 Calculate the percentage of increases and decreases of a quantity. 7 NS 1.6  Ready 7NS.1.7 Solve problems that involve discounts, markups, commissions, and profit and compute simple and compound interest. 7 NS 1.7 3 Ready 2 Not ready 7NS.2.0 Students use exponents, powers, and roots and use exponents in working with fractions: 7NS.2.1 Understand negative whole-number exponents. Multiply and divide expressions involving exponents with a common base. 7 NS 2.1  Ready 7NS.2.2 Add and subtract fractions by using factoring to find common denominators. 7 NS 2.2  Ready 7NS.2.3 Multiply, divide, and simplify rational numbers by using exponent rules. Ready 7NS.2.4 Use the inverse relationship between raising to a power and extracting the root of a perfect square integer; for an integer that is not square, determine without a calculator the two integers between which its square root lies and explain why. 7 NS 2.4  Ready 7NS.2.5 Understand the meaning of the absolute value of a number; interpret the absolute value as the distance of the number from zero on a number line; and determine the absolute value of real numbers. 7 NS 2.5  Ready 