No-calculator fluency, estimation and numeric entry

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By the end you’ll be able to

perform accurate mental calculations with whole numbers, decimals, common fractions and percentages at an appropriate level
estimate results before calculating and use benchmarks to narrow likely answers
apply efficient no-calculator strategies such as partitioning, compensating, doubling, halving and using known facts

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check no-calculator answers quickly for place-value errors, omitted digits and unreasonable size

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