Year 6 Term 2

Key Concepts – Number – 4 operations

• That addition and multiplication follow the commutative law (can be done in any order) but subtraction and division do not.
• That the inverse of addition is subtraction and vice versa and that we can use this to help check our answers as with multiplication and division.
• Presentation is key to success in formal written calculations as it reinforces place value.
• Each place value column can only contain a single digit number.
• Children should be able to look at a problem and decide on an appropriate and efficient method of calculation, eg not using columns subtraction for 100,000 – 1.
• Children should be able to select the appropriate operations from the vocabulary present in the questions and can explain the choices they have made.
• Estimation can be used to quickly check whether an answer is likely to be correct.
• Rounding can be used to generate an estimate to assist in checking the calculation.
• Children can accurately partition and exchange numbers in subtractions and divisions.
• Children can articulate and explain their reasons and actions for completing the operations.

Key Vocabulary – Four Operations

Factors

Common Factors

Multiples

Long division

Short division

Quotient

Divisor

Divisible

Dividend

Remainder

BODMAS/BIDMAS

Multi-step

Estimate

Key Concepts – Properties of shape

• Children are able to use measurement tools accurately and select the appropriate tool for the job.
• Children know that regular shapes have equal length sides and equal angles.
• Children can use a range of materials to build and explore 3D shapes.
• Children can identify the 11 nets which make a cube.
• Children know that the sum of internal angles of  a triangle is 180 ° and that for different shapes, each additional side equates to another 180° ie quadrilateral 360° , a pentagon 540°
• Children are confident in using circumference, diameter and radius accurately
• Children know that vertically opposite angles are the same.
• A range of angles can be measured accurately.

Key Vocabulary – Properties of shape

Isosceles triangle

Scalene triangle 

Rhombus 

Pentagon

Heptagon

Polygon 

Quadrilateral 

Kite

Parallelogram

Trapezium

Polyhedron

Tetrahedron

Cube

Octahedron

Dodecahedron

Icosahedron

Diameter

Radius

Circumference

Regular

Irregular

Acute

Obtuse

Reflex 

Degree

Set square

Angle measurer

Compasses

Protractor

Common Misconceptions – Addition and Subtraction

Formal written methods are not the only way of solving a problem and may not be the most efficient.

Estimation and rounding can be used to check whether an answer is likely to be correct.

Children do not present their work accurately leading to issues with place value and nonsensical answers.

A lack of understanding of vocabulary can lead to selection of inappropriate operations.

Common Misconception – Perimeter

The wrong scale on the protractor is selected which leads to inaccurate measurements.

Properties of 2D and 3D shapes are confused.

Terminology of radius and diameter are not fully understood and lead to confusion.

Children do not use the sum of internal angles knowledge to assist them in calculating with irregular polygons.