D
- Data
- Data collection
- Data display
- Data set
- Data source
- Data variable
- Date
- Datum
- Decimal
- Decimal addition
- Decimal comparison
- Decimal division
- Decimal expansion
- Decimal fraction
- Decimal multiplication
- Decimal place
- Decimal place value
- Decimal point
- Decimal subtraction
- Decompose a number
- Decompose shapes
- Deduction
- Defining attribute
- Degree of accuracy
- Denomination
- Density
- Dependent events
- Dependent variable
- Depth
- Derived fact
- Descending order
- Diagonal
- Diagram
- Diameter
- Difference
- Digit
- Digit sum
- Digital clock
- Dilation
- Dimension
- Direct proportion
- Direction
- Discrete data
- Disjunction
- Distance
- Distribution
- Distributive property
- Dividend
- Divisibility
- Divisibility rule
- Division
- Divisor
- Domain of a function
- Dot plot
- Double number line
- Doubles fact
- Drawing compass
- Duration