| Recall number facts, including positive integer complements to 100 and multiplication facts to 10 × 10, and quickly derive associated division facts. |
Recall equivalent fractions, decimals and percentages; use known facts to derive unknown facts, including products involving numbers such as 0.7 and 6, and 0.03 and 8. |
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| Strengthen and extend mental methods of calculation to include decimals, fractions and percentages, accompanied where appropriate by suitable jottings; solve simple problems mentally. |
Strengthen and extend mental methods of calculation, working with decimals, fractions, percentages, squares and square roots, cubes and cube roots; solve problems mentally. |
Use known facts to derive unknown facts; extend mental methods of calculation, working with decimals, fractions, percentages, factors, powers and roots; solve problems mentally. |
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Use surds and π in exact calculations, without a calculator; rationalise a denominator such as
1/√3 = √3/3. |
| Make and justify estimates and approximations of calculations. |
Make and justify estimates and approximations of calculations. |
Make and justify estimates and approximations of calculations. |
Make and justify estimates and approximations of calculations by rounding numbers to one significant figure and multiplying or dividing mentally. |
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