Measurement and Significant Figures
... Sig figs in calculations Rounding: In general, a calculated answer cannot be more precise than the least precise measurement from which it was calculated. Once you know the number of significant digits your answer should have, round to that many digits, counting from the left. ...
... Sig figs in calculations Rounding: In general, a calculated answer cannot be more precise than the least precise measurement from which it was calculated. Once you know the number of significant digits your answer should have, round to that many digits, counting from the left. ...
Factoring (pp. 1 Of 4)
... What does it mean to “factor” a polynomial (or, to “find its factors”)? Answers will vary. Sample: Find polynomials you could multiply to give you a certain answer. Factoring Polynomials Step One: ...
... What does it mean to “factor” a polynomial (or, to “find its factors”)? Answers will vary. Sample: Find polynomials you could multiply to give you a certain answer. Factoring Polynomials Step One: ...
Unit 1F 2013-14 - Youngstown City Schools
... long would it take them if they worked together? 2) Shawna can pour a large concrete driveway in six hours. Dan can pour the same driveway in seven hours. Find how long it would take them if they worked together. 3) It takes Trevon ten hours to clean an attic. Cody can clean the same attic in seven ...
... long would it take them if they worked together? 2) Shawna can pour a large concrete driveway in six hours. Dan can pour the same driveway in seven hours. Find how long it would take them if they worked together. 3) It takes Trevon ten hours to clean an attic. Cody can clean the same attic in seven ...
a review sheet for the final exam
... Definition: Relationship between the slopes of parallel lines Two nonvertical lines are parallel if and only if their slopes are equal and they have different y-intercepts. Vertical lines are parallel if they have different x-intercepts. Definition: Relationship between the slopes of perpendicular l ...
... Definition: Relationship between the slopes of parallel lines Two nonvertical lines are parallel if and only if their slopes are equal and they have different y-intercepts. Vertical lines are parallel if they have different x-intercepts. Definition: Relationship between the slopes of perpendicular l ...
Fractions Review
... denominators. You just need to know that dividing by a number is the same thing as multiplying by the reciprocal. (An easy example to think about is asking how many halves are there in 4? Is the same as doing 4 times 2. One half and 2 are reciprocals.) Any time you are doing a division problem that ...
... denominators. You just need to know that dividing by a number is the same thing as multiplying by the reciprocal. (An easy example to think about is asking how many halves are there in 4? Is the same as doing 4 times 2. One half and 2 are reciprocals.) Any time you are doing a division problem that ...
2010 Knockout Semi-final
... A list starts with the year 2011 and then goes back 11 years at a time, so that the list begins 2011, 2000, 1989, … . Find the earliest year of the twelfth century to appear in the list. ...
... A list starts with the year 2011 and then goes back 11 years at a time, so that the list begins 2011, 2000, 1989, … . Find the earliest year of the twelfth century to appear in the list. ...
COUNTING AND NUMBER SYSTEMS
... Tests for divisibility by 2, 5, and 10 A number is divisible by 2 if and only if its ones digit is 0,2,4,6, or 8. A number is divisible by 5 if and only if its ones digit is 0, or 5. A number is divisible by 10 if and only if its ones digit is 0. Notice that for a number to be divisible by 2, ...
... Tests for divisibility by 2, 5, and 10 A number is divisible by 2 if and only if its ones digit is 0,2,4,6, or 8. A number is divisible by 5 if and only if its ones digit is 0, or 5. A number is divisible by 10 if and only if its ones digit is 0. Notice that for a number to be divisible by 2, ...
Addition
Addition (often signified by the plus symbol ""+"") is one of the four elementary, mathematical operations of arithmetic, with the others being subtraction, multiplication and division.The addition of two whole numbers is the total amount of those quantities combined. For example, in the picture on the right, there is a combination of three apples and two apples together; making a total of 5 apples. This observation is equivalent to the mathematical expression ""3 + 2 = 5"" i.e., ""3 add 2 is equal to 5"".Besides counting fruits, addition can also represent combining other physical objects. Using systematic generalizations, addition can also be defined on more abstract quantities, such as integers, rational numbers, real numbers and complex numbers and other abstract objects such as vectors and matrices.In arithmetic, rules for addition involving fractions and negative numbers have been devised amongst others. In algebra, addition is studied more abstractly.Addition has several important properties. It is commutative, meaning that order does not matter, and it is associative, meaning that when one adds more than two numbers, the order in which addition is performed does not matter (see Summation). Repeated addition of 1 is the same as counting; addition of 0 does not change a number. Addition also obeys predictable rules concerning related operations such as subtraction and multiplication.Performing addition is one of the simplest numerical tasks. Addition of very small numbers is accessible to toddlers; the most basic task, 1 + 1, can be performed by infants as young as five months and even some non-human animals. In primary education, students are taught to add numbers in the decimal system, starting with single digits and progressively tackling more difficult problems. Mechanical aids range from the ancient abacus to the modern computer, where research on the most efficient implementations of addition continues to this day.