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YEAR 9 : number and algebra

The content for this section is sub-divided into the following areas:

Numbers and the number system Calculations Algebra
Place value, ordering and rounding Number operations Equations, formulae and identities
Integers, powers and roots Mental methods Sequences, functions and graphs
Fractions, decimals, percentage, ratio and proportion Written methods  
  Calculator methods  
  Checking results  

 

 

Numbers and the number system

Place value, ordering and rounding                        Top

Y7 Objectives Y8 Objectives Y9 Objectives Resources
  • Decimal notation and place value
  • Compare and order decimals in context

 

  • Order decimals
  H place value

S Builder Ted (BBC Maths file)

B graph paper

  • Multiply and divide by powers of 10
  • Multiply and divide integers and decimals by 0.1, 0.01
  • Multiply and divide any integer by any power of 10
W  Multiplying and dividing by 10 or 100

W  Multiplying and dividing by powers of 10

A 4 in a line

   
  • Understand upper and lower bounds
 
   
  • Begin to write numbers in standard index form
 
  • Round to nearest 10,100, or 1000
  • Round to any given power of 10
  • Round decimals to 0, 1, or 2 decimal places
  • Round numbers to 3dp's and a given number of sig. figs.
S Round off (BBC maths file)

Integers, powers and roots                                Top

Y7 Objectives Y8 Objectives Y9 Objectives Resources
  • Understand negative numbers on a no. line
   
  • Order, add and subtract -ve no.s in context
  • Add, subtract, multiply and divide integers
 
  • Recognise and use multiples and factors
  • Recognise and use multiples, factors and common factors
   
  • LCM and HCF
  • LCM and HCF
 
 
  • Recognise and use prime numbers < 100
  • Recognise and use prime numbers
  • Find the prime factor decomposition of a number
  • Use the prime decomposition of a number

 

 
  • Recognise triangular and square numbers
     
 
  • Use squares and square roots (-ve and +ve)
  • Use cubes and cube roots
  • Use ICT to estimate square roots and cube roots

 

 
 
  • Use index notation for small positive integer powers
  • Use index notation for integer powers
  • Use simple instances of the index laws
  • Know/use the index laws for x and ÷ of +ve integer powers

 

W  Mental powers

Fractions, decimals, percentages, ratio and proportion      Top

Y7 Objectives Y8 Objectives Y9 Objectives Resources
  • Use fraction notation to describe parts of shapes

 

     
  • Convert terminating decimals to fractions
  • Know that a recurring decimal is a fraction
  • Know that a recurring decimal is an exact fraction
  • Use methods to convert a recurring decimal to a fraction

 

  • Express a smaller number as a fraction of another
  • Express a number as a percentage of another
 
 
  • Simplify fractions
  • Use a diagram to compare simple fractions
  • Use division to convert a fraction to a decimal
  • Order fractions using common denominators or decimals
 
  • Begin to add and subtract simple fractions
  • Add and subtract fractions
  • Add, subtract, multiply and divide fractions
  • Cancel common factors before x or ÷ fractions
W fractions 4 in a line
  • Multiply a fraction by an integer
  • Multiply and divide an integer by a fraction
 
  • Calculate simple fractions of quantities
  • Calculate fractions of quantities
 
  • Understand percentage as the 'number of parts per 100'
  • Interpret percentage as the 'so many 100ths of'

 

 
  • Recognise equivalence of %'s, fractions and decimals
  • Use equivalence of fractions, decimals and percentages
  S salloon snap (BBC Maths file)

H higher questions

O bingo numbers

  • Calculate percentages
  • Calculate percentages and % increase and decrease
  • Solve problems involving percentage changes
  • Calculate the result of a proportional change using only x
W percentage blockbusters
  • Use percentages to compare simple proportions
 
  • Use fractions or percentages to compare proportions
  • Use proportional reasoning to solve a problem
 
  • Understand the relationship between ratio and proportion
  • Consolidate understanding of ratio and proportion
  • Recognise the links between fraction notation and ratio
   
  • Reduce a ratio to its simplest form
  • Reduce a ratio to its simplest form (inc. different units)
   
  • Divide a quantity by a given ratio
  • Divide a quantity by a given ratio
   
  • Solve simple problems about ratio and proportion informally
  • Solve simple problems about ratio and proportion formally
  • Interpret and use ratio in a range of contexts

 

 

Calculations

Number operations and the relationships between them      Top

Y7 Objectives Y8 Objectives Y9 Objectives Resources
  • Consolidate understanding of multiplication and division
  • Understand operations of + and - of fractions and integers
  • Understand the operations of x and ÷ of integers
  • Understand effects of x and ÷ by numbers between 0 and 1
 
  • Know how to use the laws of arithmetic
 
  • Use laws of arithmetic and inverse operations
O W W  Inverse operations
   
  • Recognise and use reciprocals
 
  • Know and use order of operations including brackets

 

  • Use order of operations with more complex calculations

 

  • Understand the order of precedence and effect of powers
 

Mental methods and rapid recall of number facts                Top

Y7 Objectives Y8 Objectives Y9 Objectives Resources
  • Positive integer complements of 100
     
 
  • Recall fraction to decimal conversions
   
  • Multiplication facts up to 10x10 and related division facts
  • Use known facts to derive unknown facts
  • Use known facts to derive unknown facts
 
   
  • Extend decimals, fractions and percentages
W  Decimal make ten
 
  • Consolidate squares and cubes and roots
  • Extend factors, powers and roots
W  Powers
  • Decimals, fractions and percentages
  • Consolidate decimals, fractions and percentages
   
  • Solve simple word problems mentally
  • Solve word problems mentally
  • Solve word problems mentally
 
  • Make and justify estimates and approximations
  • Make and justify estimates and approximations
  • Make and justify estimates and approximations
  • Estimate calculations by rounding to 1 significant figure
 

Written methods                                                                Top

Y7 Objectives Y8 Objectives Y9 Objectives Resources
  • Standard column procedures for whole numbers
  • Standard column procedures for decimals up to 2 dp
  • Standard column procedures for decimals up to 2 dp
  • Standard column procedures for any numbers
 
 
  • Column procedures for x and ÷ of integers/decimals
  • Multiply and divide by decimals
 
  • Multiply and divide 3 digit by 2 digit whole numbers
     
 
  • Understand where to position the point
   

Calculator methods                                                        Top

Y7 Objectives Y8 Objectives Y9 Objectives Resources
  • Use brackets and memory for multi step calculations
  • Use brackets and memory for multi step calculations
  • Use brackets and memory
  • Use calculator efficiently - not rounding intermediate steps
 
   
  • Use pi
 
  • Use the sign change key
  • Use the sign change key
  • Use the sign change keys
 
  • Use the square root key
  • Use powers and roots
  • Use powers and roots keys
 
 
  • Use the fraction keys
  • Use the fraction keys
 
   
  • Use the reciprocal key
 
  • Enter no.s and interpret the display in different contexts
  • Enter no.s and interpret the display in different contexts
  • Enter no.s and interpret the display in different contexts
 

Checking results                                                            Top

Y7 Objectives Y8 Objectives Y9 Objectives Resources
  • Check results by working the problem backwards
  • Check results by working the problem backwards
  • Check results by working the problem backwards
 
  • Consider whether the result is the right order of magnitude
  • Consider whether the result is the right order of magnitude
  • Consider whether the result is the right order of magnitude
 

Algebra

Equations, formulae and identities                            Top

Y7 Objectives Y8 Objectives Y9 Objectives Resources
  • Use letter symbols to represent unknowns
  • Distinguish role of letters in equations, formulae, functions
  • Distinguish role of letters in equations, formulae, functions
  • Know the meanings of term, expression and equation
  • Know the meanings of formula and function
 
  • Know algebraic operations follow the rules of arithmetic
  • Know algebraic operations follow the rules of arithmetic
   
 
  • Use index notation for small positive integer powers
  • Use index notation for integer powers - index laws
  • Know use index laws in generalised form for x and ÷
  • Simplify linear expressions by collecting like terms
  • Simplify/transform linear expressions by collecting terms
  • Simplify by taking out single term common factors
W  Pyramid algebra

W W the dots game

O algebra shapes

  • Begin to multiply a single term over a bracket
  • Multiply a single term over a bracket
  • Square a linear expression or expand (x ± n)(x ± m)
  • Establish difference of two squares
  • Construct and solve simple linear equations
  • Construct and solve simple linear equations
  • Construct/solve linear equations with integer coefficients
O B W W W  Pyramids

W W W W  Pyramid rules

M missing numbers

S Equation match (BBC Maths file)

 
  • Begin to use graphs to set up equations
  • Solve an equation graphically
  • Solve simultaneous equations algebraically or graphically
   
  • Solve inequalities in one variable and represent on no. line
  • Begin to solve inequalities in two variables
   
  • Use systematic trial and improvement methods (ICT)
   
  • Solve problems involving direct proportion (ICT)
  • Use simple formulae from mathematics and other subjects
  • Use formulae from mathematics and other subjects
  • Use formulae from mathematics and other subjects
  • Substitute integers in simple linear expressions
  • Substitute integers in simple formulae
  • Substitute +ve integers into expressions with small powers
  • Substitute numbers in expressions and formulae
S late delivery (BBC Maths file)

W W the dots game

W W 4 in a line

H fahrenheit to celcius

  • Derive simple formulae
  • Derive simple formulae
  • Derive and use more complex formulae
   
  • Change the subject of a formula

Sequences, functions and graphs                                Top

Y7 Objectives Y8 Objectives Y9 Objectives Resources
  • Generate and describe simple integer sequences
  • Generate terms of a simple sequence, given a rule
  • Generate and describe simple integer sequences
  • Generate terms of a linear sequence (paper or ICT)
  • Generate terms of a sequence (paper or ICT)
  • Generate sequences from practical contexts
 
  • Generate sequences from practical contexts
H sequence
 
  • Begin to use linear expression to describe the nth term
  • Write the nth term of an arithmetic sequence
  • Find the next term and nth term of quadratic sequences
  • Express simple functions in words, then symbols
  • Express simple functions in symbols
 
  • Represent simple functions in mappings
  • Represent  mappings expressed algebraically
 
   
  • Deduce properties of sequences from spatial patterns
  • Generate co-ordinate pairs that satisfy a simple rule
  • Generate points in all four quadrants
  O W W co-ordinate grids
  • Plot graphs of simple linear functions (paper or ICT)
  • Plot the graphs of linear functions (y in terms of x)  (ICT)
  • Plot graphs of linear functions
  • Find the inverse of a linear function - plot its graph
  • Recognise straight line graphs parallel to x or y axis
  • Begin to plot and interpret graphs of simple linear functions
  • Recognise equations of the form y = mx + c
  • Find the gradient of lines of the form y = mx + c
  • Investigate the gradients of parallel and perpendicular lines
S planet hop (BBC Maths file)
 
  • Construct/plot linear functions from real-life problems
  • Interpret graphs arising from real-life situations
  • Construct linear functions & graphs from real life problems
  • Discuss/interpret graphs arising from real life situations
   
  • Discuss/interpret distance-time graphs
   
  • Plot graphs of simple quadratic and cubic functions
  • Know simple properties of quadratic functions