Grade_7_mental_math_strategies
... EX: 1/6 + 5/12 = 7/12 {Common Denominator is 12; Double 1/6 to get 2/12, then add the top numbers 2 + 5 = 7, leave the bottom as 12. Answer is 7/12} 10. Rounding off $ Values (Round to the nearest dollar and subtract the extra cents added on) EX: $2.97 + $3.99 becomes $3.00 + $4.00= $7.00, however, ...
... EX: 1/6 + 5/12 = 7/12 {Common Denominator is 12; Double 1/6 to get 2/12, then add the top numbers 2 + 5 = 7, leave the bottom as 12. Answer is 7/12} 10. Rounding off $ Values (Round to the nearest dollar and subtract the extra cents added on) EX: $2.97 + $3.99 becomes $3.00 + $4.00= $7.00, however, ...
2008 Rocket City Junior Math Mania Individual Test – 4th Grade
... 2. A right triangle has an area of 32 cm2 and a leg measuring 4 cm. What is the length, in centimeters, of the other leg? 3. How many ways are there to arrange the letters in the word “SASSY”? 4. What is the area, in square centimeters, of a circle with a radius of 11 cm? 5. What is the largest mult ...
... 2. A right triangle has an area of 32 cm2 and a leg measuring 4 cm. What is the length, in centimeters, of the other leg? 3. How many ways are there to arrange the letters in the word “SASSY”? 4. What is the area, in square centimeters, of a circle with a radius of 11 cm? 5. What is the largest mult ...
NUMBERS (MA10001): PROBLEM SHEET 2, SOLUTIONS 1. Prove
... This one is easy (some like this can be complicated): 2k+1 = 2 × 2k > 2(k + 1)2 = 2k 2 + 4k + 2 = (k + 2)2 + k 2 − 2, and that is greater than (k + 2)2 as long s k 2 > 2, for which k ≥ 5 is plenty. Notice that 26 = 64 > 72 = 49 (but 25 = 32 < 62 = 36). 2. Find the sum of all the natural numbers les ...
... This one is easy (some like this can be complicated): 2k+1 = 2 × 2k > 2(k + 1)2 = 2k 2 + 4k + 2 = (k + 2)2 + k 2 − 2, and that is greater than (k + 2)2 as long s k 2 > 2, for which k ≥ 5 is plenty. Notice that 26 = 64 > 72 = 49 (but 25 = 32 < 62 = 36). 2. Find the sum of all the natural numbers les ...
1-1 Expressions and Formulas
... It is a mathematical statement with variables. 3x + 4 So what is an Equation? It an expression that equals a given value, thus you can solve an equation. ...
... It is a mathematical statement with variables. 3x + 4 So what is an Equation? It an expression that equals a given value, thus you can solve an equation. ...
Algebra Cheat Sheet
... irrational number: A number that is not rational (cannot be written as a fraction x/y, with x a natural number and y an integer); for example, √3 or π. rational number: An integer or fraction such as 7/8 or 9/4 or 5/1. Any number that can be written as a fraction x/y with x a natural number and y an ...
... irrational number: A number that is not rational (cannot be written as a fraction x/y, with x a natural number and y an integer); for example, √3 or π. rational number: An integer or fraction such as 7/8 or 9/4 or 5/1. Any number that can be written as a fraction x/y with x a natural number and y an ...
fract2
... overall geometric form and structure repeat at various scales they provide us with a “glimpse” into the wonderful way in which nature and mathematics meet. • Fractals often arise when investigating numerical solutions of differential (and other equations). … go to XAOS ...
... overall geometric form and structure repeat at various scales they provide us with a “glimpse” into the wonderful way in which nature and mathematics meet. • Fractals often arise when investigating numerical solutions of differential (and other equations). … go to XAOS ...
Algebra 2 – NOTES: Function Notation Day 1
... A relationship between input and output Each element of the domain is paired with exactly one element of the range. o In other words, there is exactly one output for each input. o The x-values can’t repeat and give you two different answers for y. On a graph, it passes the vertical line test F ...
... A relationship between input and output Each element of the domain is paired with exactly one element of the range. o In other words, there is exactly one output for each input. o The x-values can’t repeat and give you two different answers for y. On a graph, it passes the vertical line test F ...
KU Mult 4 Decimals by single digit numbers Session plan
... number as a factor (e.g. choosing three numbers from one times table). The other player guesses the factor. Are there any other numbers which are also a factor? Repeat so that pupils have three goes each. Teacher input with whole class Write 54 on the board and remind pupils how to find all the ...
... number as a factor (e.g. choosing three numbers from one times table). The other player guesses the factor. Are there any other numbers which are also a factor? Repeat so that pupils have three goes each. Teacher input with whole class Write 54 on the board and remind pupils how to find all the ...
Adding Integers
... answer is -20 Both numbers have a different sign. Therefore we subtract: 10 – 5 = 5. Since 10 is bigger than 5, we keep the sign from 10, which is negative. Both numbers have different signs, so we have to subtract: 6-1=5. The bigger number is 6 and it’s positive, so our answer is positive. Both num ...
... answer is -20 Both numbers have a different sign. Therefore we subtract: 10 – 5 = 5. Since 10 is bigger than 5, we keep the sign from 10, which is negative. Both numbers have different signs, so we have to subtract: 6-1=5. The bigger number is 6 and it’s positive, so our answer is positive. Both num ...
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.