Mental Maths
The ability to calculate in your head is an important part of mathematics. It is also an essential part of coping with real-life events such as shopping, or reading a timetable.
At Croyland Primary School, we encourage mental maths in all maths lessons. Pupils have weekly mental maths lesson that follow termly Key Instant Recall Facts objectives which is attached below.
These objectives build on previous learning, progress over the year and promote the use of mental strategies.
Key Instant Recall Facts (KIRFs)
The termly objective will be a focus in one of the mental maths sessions (MM Objective / Method consolidation / Times Tables).
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Autumn 1 |
Autumn 2 |
Spring 1 |
Spring 2 |
Summer 1 |
Summer 2 |
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Year 1
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Recall all number bonds within 10 2 + 4 2 + 5 2 + 6 2 + 7 3 + 4 3 + 5 3 + 6 4 + 5
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2 + 8 3 + 7 4 + 6
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Recall all number bonds within 20 2 + 9 3 + 8 3 + 9 4 + 7 4 + 8 4 + 9 5 + 6 5 + 7 5 + 8 5 + 9 6 + 7 6 + 8 6 + 9 7 + 8 7 + 9 8 + 9 |
Count in 10s to 100 0 to 100
Count in 5s to 50 From 0 to 50
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Count in 2s to 20 From 0 to 20
Recall all doubles and halves to 20
6 + 6 7 + 7 8 + 8 9 + 9 10 + 10
Half of 20 is 10 Half of 18 is 9 Half of 16 is 8 Half of 14 is 7 Half of 12 is 6
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2 + 18 3 + 17 4 + 16 5 + 15 6 + 14 7 + 13 8 + 12 9 + 11 |
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Year 2
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Recall number bonds to 100 - multiples of 10
10 + 90 20 + 80 30 + 70 40 + 60 50 + 50 |
Recall number bonds to 100 - multiples of 5
5 + 95 15 + 85 25 + 75 35 + 65 45 + 55 |
Recall 5, 10 x table - Multiplication and division facts
3 x 5 3 x 10 4 x 5 4 x 10 5 x 5 6 x 10 6 x 5 7 x 10 7 x 5 8 x 10 8 x 5 9 x 10 9 x 5 11 x 10 10 x 5 12 x 10 11 x 5 12 x 5
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Recall 2 x table – multiplication and division facts
11 x 2 12 x 2 |
Recap on objectives from Y1 & Y2
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Recap on objectives from Y1 & Y2 |
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Year 3
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Recall of number bonds to 100 - any number
(E.g. 34 + __ = 100) by making 90 using the tens and 10 using the ones |
Recall 3 x table multiplication and division facts
3 x 3 4 x 3 6 x 3 7 x 3 8 x 3 9 x 3 11 x 3 12 x 3 |
Double 2 digit numbers e.g. What is double 34.
Doubler tens then double ones. |
Recall 4 x table multiplication and division facts
4 x 4 6 x 4 7 x 4 8 x 4 9 x 4 11 x 4 12 x 4
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Half even numbers to 100 e.g. What is half of 36
Half the tens, half the ones, add together. |
Recall 8x table - Multiplication and division facts
6 x 8 7 x 8 8 x 8 9 x 9 11 x 8 12 x 8
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Year 4
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Recall of number bonds to 1000 - any number
(E.g. 341 + __ = 1000)
by making 900 using the hundreds, 90 using the tens and 10 using the ones |
Recall 6 x table multiplication & division facts
6 x 6 7 x 6 9 x 6 11 x 6 12 x 6
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Recall 7 x table multiplication & division facts 7 x 7 9 x 7 11 x 7 12 x 7
Recall 9 x table multiplication & division facts 8 x 9 8 x 11 8 x 12 |
Recall 11 & 12 x table multiplication & division facts
Derive quickly decimal equivalents of any number of tenths or hundredths E.g. 410=0.4
0.72=72100 |
Recall all multiplication and division facts for the multiplication tables up to 12x12
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Recall these decimal equivalents along with tenths and hundredths e.g. 0.07 = 7/100
12=0.5
34=0.75
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Year 5
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Recall Roman Numerals up to M (I, V, X, L, C, D) I One V Five X Ten L 50 C 100 D 500 M 1000
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Recall all prime numbers up to 19
Recall square numbers up to 144 and know the notation for squared (²)
Recall cube numbers up to 125 and recognise the notation for cubed (³) |
Apply times table knowledge to decimals where one number is a decimal number E.g. knowing 4 x 3 = 12 can be applied to 0.4 x 3 = 1.2 |
Recall formula:
perimeter of a rectangle: (2 x length) + (2 x width)
area of rectangles: length x width (area is usually measured in square units cm² and m²)
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Add and Subtract fractions with denominators that are multples of the same number e.g. What is 1/8 + ¾? |
Recall percentage and decimal equivalents of
12,14,15,25and45
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Year 6
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Recall pairs of numbers which total 1 up to three decimal places using and applying knowledge of previous number bond understanding E.g. 0.343 + __ = 1 by making 0.9 using the tenths, 0.09 using the hundredths and 0.01 using the thousandths |
Recall order of operations
Brackets / Multiplication and Division / Addition and Subtraction
Apply times table knowledge to decimals where both numbers are decimal numbers E.g. knowing 4 x 3 = 12 can be applied to 0.4 x 0.3 = 0.12 |
Recall percentage and decimal equivalents of 34,35, tenths up to910,13and23 (approximate)
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Recall formula:
volume of cubes and cuboids (length x width x height)
Know that volume is notated in cubic units (e.g. cm³ and mm³)
Recall formula: area of a triangles: 12 (base x height)
Recall formula: area of parallelograms: base x height |
Consolidate on Y5 & Y6 Objectives |
Consolidate on Y5 & Y6 Objectives |
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