Operations
To add the same number a certain number of times.
(Example: 3 × 4 = 12 means 3 groups of 4)
Multiply
The distance around a shape (add all sides).
Perimeter
A part of a whole.
(Example: ½ means one out of two equal parts)
Fraction
Formed when two lines meet at a point.
Angle
A close guess or rounded answer.
Estimate
To split a number into equal parts.
equal groups
Divide
The space inside a shape (length × width for rectangles).
Area
The top number of a fraction; how many parts you have.
Numerator
An angle that makes a perfect corner (90°).
Right Angle
To change a number to the nearest ten, hundred, etc.
Round
The answer to a multiplication problem.
Product
How much time has passed between two times.
Elapsed Time
The bottom number of a fraction; total parts in the whole.
Denominator
An angle smaller than a right angle (<90°)
Acute Angle
To look at two numbers or amounts to see which is bigger or smaller.
Compare
The answer to a division problem.
Quotient
The amount of space something takes up.
volume
A number that shows part of a whole using a dot (like 0.5).
Decimal
An angle larger than a right angle (>90°).
Obtuse Angle
The same as. (=)
Equal To
A number that is multiplied by another number.
Factor
How heavy something is.
Weight
Fractions that have the same value (½ = 2⁄4).
Equivalent Fractions
A shape has symmetry if it can be folded into two matching parts.
Symmetry
(>)-more than
(<)-smaller than
Greater Than ( > ) – More than.
Less Than ( < ) – Smaller than.