How to Calculate Quickly: Full Course in Speed Arithmeticby Henry Sticker
Many useful procedures explained and taught: 2-column addition, left-to-right subtraction, direct multiplication by numbers greater than 12, mental division of large numbers, more. Also numerous helpful shortcuts. More than 8,000 problems, with solutions.
- Beta Nu Publishing
- Publication date:
- Product dimensions:
- 6.00(w) x 9.00(h) x 0.45(d)
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It was a very helpful book to increase your mental calculations. It was easy to understand with helpful exercise.