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Level 289

Real Numbers, Addition, Subtraction & Estimation

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Natural numbers
A group of numbers that include 1,2, 3,.....
Whole Numbers
real numbers
Any Number
The number that corresponds to a point on a number line
Rational numbers
Numbers that include integers, wholes, and natural numbers.
the set of positive whole numbers and their opposites(negative numbers) and 0
A mathematical sentence that shows the relationship between quantities that are not equivalent
absolute value
The distance of a number from zero on a number line; shown by | |
Addition Property of Opposites
To add the same number to each side of an equation and have the two sides remain equal
additive inverse
the opposite of a number
Associative Property
(1 + 2) + 3 = 1 + (2 + 3)
Closure Property
The sum and product of any two real numbers are also real numbers.
Commutative Property
3 + 2 = 2 + 3
Identity Property
the sum of any number and zero is the original number
Inverse Property
The sum of a number and its opposite is 0.
Pairs of numbers that when multiplied together equal 1;
multiplicative inverse
reciprocal of a number
A mathematical notation indicating the number of times a quantity is multiplied by itself
the number that is written with an exponent
distributive property
Multiplying a sum by a number is the same as multiplying each term by the number and then adding (or subtracting ) the products.
exponential form
a number is in this form when it is written with a base and an exponent
Negative Exponents
take the reciprocal of the base and make the exponent positive. a⁻³=1/a³;
Scientific notation
where a number is written into 2 parts first just the digits (with decimal point after first digit) followed by ×10 to a power
the sum of all the values divided by the number of values
A segment or Ray that joins a vertex to the midpoint of the opposite side
the most common value
coordinate plane
A plan formed by the intersection of a horizontal number line called the x-axis and a vertical number line called the y-axis.
The difference between the greatest number and the least number in a set of data.
Linear Equations
an equation whose graph is a straight line
Mean, Median, Mode
Measures of Central Tendency
number line
a diagram that represents numbers as points on a line.
Execute the same pattern, but with different values of variables.