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79 Cards in this Set
- Front
- Back
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acute angle |
an angle less than 90 degrees |
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addend |
numbers added in an addition problem Example: 2 + 4 = 6 2 and 4 are addends |
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angle |
shaped formed by two rays or line segments |
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area |
the number of unit squares needed to cover a flat surface |
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array |
an arrangement of objects in rows and columns |
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compare |
to describe whether numbers are equal to, less than, or greater than each other |
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compatible numbers |
numbers that are easy to compute mentally |
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data |
information collected about people or things |
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decimal number |
a number with one or more digits to the right of the decimal point |
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decimal point |
a dot to separate the ones and tenths place |
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denominator |
the bottom number in a fraction |
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difference |
the answer to a subtraction problem |
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digit |
any one of ten symbols, 0, 1, 2, 3, 4, 5, 6, 7, 8, or 9 used to write numbers |
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addition |
to find the total number of objects in two or more groups |
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divide |
to separate into equal groups; the opposite operation of multiplication |
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dividend |
the number that is to be divided in a division problem |
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divisible |
a number is divisible by another number if there is no remainder |
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division |
the process of sharing a number of items to find how many equal groups can be made or how many items will be in each equal group; the opposite operation of multiplication |
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divisor |
the number that divides the dividend Example: 15/3 The divisor is 3 |
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endpoint |
the point at either end of a line segment or the starting point of a ray |
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equal groups |
groups that have the same number of objects |
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equal parts |
parts that are exactly the same size |
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equal sign |
a symbol used to show that two numbers have the same value Example: 384 = 384 |
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equal |
having the same value Example: 4 + 4 is equal to 3 + 5 |
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equation |
a number sentence which shows that two quantities are equal Example: 4 + 5 = 9 |
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equivalent |
having the same value or naming the same amount |
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equivalent decimals |
two or more decimals that name the same amount |
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equivalent fractions |
two or more fractions that name the same amount Example: 1/4, 2/8, and 4/16 name the same amount |
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estimate |
to find an answer that is close to the exact amount |
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even number |
a whole number that has a 0, 2, 4, 6, or 8 in the ones place |
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expanded form |
a way to write numbers by showing the value of each digit Example: 253 = 200 + 50 + 3 |
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fact family |
a set of related multiplication and division equations, or addition and subtraction equations Example: 5 + 4 = 9 4 + 5 = 9 9 - 5 = 4 9 - 4 = 5 |
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factor |
a number that is multiplied by another number to find a product Example: 4 x 5 = 20 4 and 5 are factors of 20 |
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formula |
a set of rules that expresses a mathematical rule such as finding area Example: Area = length x width or A = l x w |
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fraction |
a number that names a part of a whole or part of a group |
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greater than sign |
a symbol used to compare two quantities, with the greater quantity given first Example: 6 > 4 |
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horizontal |
in the direction from left to right |
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hundredth |
one of one hundred equal parts Example: 12 hundredths is 12 parts of one hundred |
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input/output table |
a table that matches each input value with an output value, where the output values are determined by a pattern or function |
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intersecting lines |
lines that cross each other at exactly one point |
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less than sign |
a symbol used to compare two quantites, with the lesser quantity give first Example: 3 < 7 |
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line |
a straight path of points that continues without end in both directions |
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line of symmetry |
an imaginary line on a shape about which the shape can be folded so that its two parts match exactly |
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line segment |
a part of a line that includes two points called endpoints and all the points between them |
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mixed number |
an amount given as a whole number and a fraction |
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improper fraction |
a fraction in which the numerator is the same as or greater than the denominator |
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multiplication |
a process to find the total number of items in equal sized groups, or to find the total number of items in a given number of groups when each group contains the same number of items; multiplication is the inverse of division |
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number line |
a line on which numbers can be located |
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number sentence |
a sentence that includes numbers, operation symbols, and a greater than, less than, or equal sign |
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numerator |
the number above the bar in a fraction that tells how many parts of the whole or group are being considered |
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obtuse angle |
an angle that measures greater than 90 degrees and less than 180 degrees |
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odd number |
a whole number that has a 1, 3, 5, 7, or 9 in the ones place |
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parallel lines |
lines that never intersect and are always the same distance apart |
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parentheses |
the symbols used to show which operation or operations in an expression should be done first Example: P = (2 x l) + (2 x W) Multiply in the parentheses first and then add the products |
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partial products |
a method of multiplying in which the ones, tens, hundreds and so on are multiplied separately and then the products are added together |
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pattern |
an ordered set of numbers or objects; the order helps you predict what will come next Example: 2, 4, 6, 8, 10...... |
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perimeter |
the distance around a figure |
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period |
each group of three digits separated by commas Example: 85,643,852 has three periods |
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perpendicular lines |
two lines that intersect to form right angles |
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place value |
the value of a digit in a number, based on the location of the digit |
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product |
the answer to a multiplication problem |
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quadrilateral |
a polygon with four sides and four angles |
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polygon |
a closed two-dimensional formed by three or more straight side |
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quotient |
the number, not including the remainder, that results from dividing |
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ray |
a part of a line; it has one endpoint and continues without an end in one direction |
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rectangle |
a quadrilateral with two pairs of parallel sides, two pairs of sides of equal length, and four right angles |
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remainder |
the number left over when a number cannot be divided equally |
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right angle |
an angle that forms a square corner and has exactly 90 degrees |
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round |
to replace a number with another number that tells about how many or how much |
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rule |
a procedure to determine an output value from an input value |
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simplest form |
a fraction is in simplest form when the numerator and denominator have only 1 as a common factor |
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standard form |
a way to write numbers by using the digits 0-9, with each digit have a place value Example: 3,467 is in standard form |
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sum |
the answer to an addition problem |
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tenth |
one of ten equal parts |
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unit fraction |
a fraction that has a numerator of one |
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vertical |
in the direction from top to bottom |
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whole |
all the parts of a shape |
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word form |
a way to write numbers using words
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Fourth Grade Math Vocabulary First Semester Created By Christine Davis Black Elementary 2015 - 2016 |
Created December 3, 2015 |
