area models |
A model of multiplication that shows each place value product |
commutative property |
The sum/product stays the same when the order of the addends is changed. a + b = b + a, or a x b = b x a. (Ex: 3 + 5 = 5 + 3 or 5 x 3 = 3 x 5) |
conversion factor |
A numerical factor used to multiply or divide a quantity when converting from one system of units to another. (Ex the conversion factor is 3 for converting yards to feet. 2yds x 3 = 6 feet) |
decimal divisor |
a divisor with a decimal |
decimal fraction |
A fractional number with a denominator of a power of 10, usually written with a decimal point. (Ex. 0.1; 0.01; 0.001; etc.) |
denominator |
The number or expression written below the line in a fraction. (Ex. In the fraction 4/5, the denominator is 5) |
distribute |
give, share, deal out |
equation |
A statement that two mathematical expressions are equal. (Ex. 9 x 3 = 20 + 7) |
equivalent fraction |
Fractions that have the same value. (Ex. 1/2 = 2/4 = 4/8…) |
expression |
A variable or combination of variables, numbers, and symbols that represents a mathematical relationship. (Ex. x + 3) |
factors |
An integer that divides evenly into another number. (Ex. 2 x 6 = 12, 2 and 6 are factors) |
fraction greater than or equal to 1 |
a combination of whole numbers and fractions OR a numerator greater than or equal to the denominator (improper fraction) (ex. 1 3/4, 4/3) |
fractional unit |
dividing a unit into equal parts |
hundredth |
In the decimal numeration system, hundredths is the name of the next place to the right of tenths (Ex In the number 4.38, 8 is in the hundredths place) |
line plot |
A diagram showing frequency of data on a number line. |
mixed number |
A number with an integer and a fraction part. (Ex. 3 1/2) |
number lines |
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numerator |
The number or expression written above the line in a fraction. (Ex. In the fraction 4/5, the numerator is 4) |
parentheses ( ) |
Used to group symbols and operations in math. When simplifying an expression, the operations within the parentheses are performed first. |
quotient |
The result of the division of one quantity by another. (Ex. 20/5 =4. 4 is the quotient) |
simplify |
To express a fraction in simplest form. (Ex. 8/10 in simplest form is 4/5) |
tape diagram |
A strategy and visual model used to help solve problems. |
tenth |
In the decimal numeration, tenths is the name of the place to the right of the decimal
point. (Ex. In the number 4.3, 3 is in the tenths place) |
unit |
A quantity chosen as a standard in terms in which other quantities may be expressed. (Ex. If 3 units = 270 cups, then 1 unit = 90 cups) |
unit fraction |
A fraction with a numerator of 1. |
unknown |
the missing part |
whole unit |
the whole/total quantity in a given problem (Ex. Top of a tape diagram) |
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