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Secrets of mental math - Arthur Benjamin, How to calculate quickly, full…
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How to calculate quickly, full course in speed arithmetic - Henry Sticker
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- Adding single columns by pairs, starts on
- Adding single columns by trios, start on
- Mental addition of large numbers, start on
- Two-column addition, starts on
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- Left-to-right subtraction, starts on
- Multiplication in general
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- Direct multiplication by numbers greater than 12, start on
- Multiplying three figures by one, start on
- Multiplying two figures by two, starts on
- Multiplying three figures by two, start on
- Multiplying three figures by three, start on
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- Direct division by numbers greater than 12, starts on
- Mental division of large numbers, starts on
- Division by three figures, starts on
- Division by two figures, starts on
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- Addition and subtraction of fractions, starts on
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- Decimal equivalents of fractions, starts on
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- Combined addition and subtraction
- Multiplying by a near number
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- Simplifying the multiplier
- Multiplication by factoring
- Factors between 11 and 19
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- Multiplying by 21, 31, 41, etc
- Squares of numbers, starts on
- Multiplying when corresponding orders are alike
- Multiplying a sum by a difference
- Multiplications involving fractions, starts on
- Aliquot parts in division
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