Glossary: Terms Starting with D

2D shape

MathsFrom Grade 2

A flat shape.

Learn it in: Properties of 2D shapes (Grade 2)

3D shape

MathsFrom Grade 2

A solid shape.

Learn it in: Properties of 3D shapes (Grade 2)

data

MathsFrom Grade 1

Facts we collect.

Learn it in: Interpreting simple data (Grade 1), Collecting data (Grade 2), Collecting data (Grade 3)

data value

MathsFrom Grade 4

One measurement.

Learn it in: Line plots (Grade 4)

dataset

MathsFrom Grade 4

A group of data.

Learn it in: Comparing datasets (Grade 4), Comparing datasets (Grade 5)

day

MathsFrom Grade 1

A time of 24 hours.

Learn it in: Days of the week (Grade 1), Comparing durations (Grade 2)

decimal

MathsFrom Grade 4

A number with a decimal point.

Full explanation with examples and practice →

Learn it in: Understanding tenths (Grade 4), Writing decimals (Grade 4), Fractions and decimals (Grade 4)

decimal place

MathsFrom Grade 6

Digit after the point.

Learn it in: Decimal multiplication (Grade 6), Rounding and estimation (Grade 6)

decimal places

MathsFrom Grade 5

Digits after the point.

Learn it in: Multiplying decimals (Grade 5)

decimal point

MathsFrom Grade 4

Separates ones from tenths.

Full explanation with examples and practice →

Learn it in: Understanding tenths (Grade 4), Understanding hundredths (Grade 4), Decimal place value (Grade 5)

decrease

MathsFrom Grade 6

Make smaller.

Learn it in: Introductory percentage increase and decrease (Grade 6)

degree

MathsFrom Grade 4

Unit of angle size (°).

Learn it in: Angles (Grade 4), Measuring angles (Grade 4)

denominator

MathsFrom Grade 2

The bottom number: equal parts in the whole.

Full explanation with examples and practice →

Learn it in: Recognising unit fractions (Grade 2), Representing simple fractions (Grade 2), Unit fractions (Grade 3)

descending

MathsFrom Grade 1

From greatest to smallest.

Learn it in: Ordering numbers (Grade 1), Ordering numbers (Grade 2), Ordering numbers (Grade 3)

describe

MathsFrom Grade 1

Say what something is like.

Learn it in: Identifying shapes in everyday life (Grade 1), Identifying shapes (Grade 2)

diagonal

MathsFrom Grade 6

Line joining opposite corners.

Learn it in: Geometric properties (Grade 6)

difference

MathsFrom Grade 1

The answer to a subtraction.

Learn it in: Meaning of subtraction (Grade 1), Subtraction within 20 (Grade 1), Subtraction within 100 (Grade 2)

different

MathsFrom Grade 1

Not the same.

Learn it in: Classifying objects (Grade 1)

digit

MathsFrom Grade 1

One of the symbols 0 to 9. The number 12 uses two digits.

Learn it in: Reading and writing numbers (Grade 1), Tens and ones (Grade 1), Understanding ones (Grade 1)

digit value

MathsFrom Grade 4

Digit times the place.

Learn it in: Place value (Grade 4), Place-value review (Grade 6)

digital clock

MathsFrom Grade 3

A clock that shows time in numbers.

Learn it in: Reading digital clocks (Grade 3)

digital time

MathsFrom Grade 2

Time shown in numbers like 4:10.

Learn it in: Time to five-minute intervals (Grade 2)

dimension

MathsFrom Grade 6

Length, width or height.

Learn it in: Volume of rectangular prisms (Grade 6)

direction

MathsFrom Grade 1

Which way to go.

Learn it in: Position and direction (Grade 1), Rays (Grade 4)

discount

MathsFrom Grade 5

Amount taken off a price.

Learn it in: Simple percentage applications (Grade 5), Discounts (Grade 6)

distance

MathsFrom Grade 4

How far apart.

Learn it in: Parallel lines (Grade 4), Plotting points (Grade 5), Integers on number lines (Grade 6)

distribute

MathsFrom Grade 6

Multiply each part inside.

Learn it in: Equivalent expressions (Grade 6)

distribution

MathsFrom Grade 6

How data are spread.

Learn it in: Interpreting distributions (Grade 6)

distributive

MathsFrom Grade 3

Split a factor into easier parts.

Learn it in: Multiplication properties (Grade 3), Multiplication properties (Grade 4)

divide

MathsFrom Grade 2

Share or group equally.

Learn it in: Division using objects (Grade 2), Division using pictures (Grade 2), Relationship between multiplication and division (Grade 2)

dividend

MathsFrom Grade 3

The number being divided.

Learn it in: Division with remainders (Grade 3), Division fact review (Grade 4), Division with remainders (Grade 4)

divisible

MathsFrom Grade 4

Can be divided with no remainder.

Learn it in: Understanding factors (Grade 4), Understanding multiples (Grade 4)

division fact

MathsFrom Grade 3

A sentence like 27 ÷ 3 = 9.

Learn it in: Division facts (Grade 3)

division sign (÷)

MathsFrom Grade 2

The sign that means divide.

Learn it in: Division using objects (Grade 2)

divisor

MathsFrom Grade 3

The number we divide by.

Learn it in: Division as sharing (Grade 3), Division facts (Grade 3), Division with remainders (Grade 3)

dot plot

MathsFrom Grade 6

Dots above a number line.

Learn it in: Dot plots (Grade 6)

double

MathsFrom Grade 1

Add the same number twice, like 4 + 4.

Learn it in: Addition within 20 (Grade 1), Mental addition strategies (Grade 2), Multiplication facts for 2, 5 and 10 (Grade 2)

draw

MathsFrom Grade 1

Make a picture with a pencil.

Learn it in: Addition using pictures (Grade 1)

duration

MathsFrom Grade 2

How long something takes.

Learn it in: Comparing durations (Grade 2), Elapsed time (Grade 3)