Chapter II: Delightful Digits
“Multiply in your head 365,365,365,365,365,365 by 365,365,365,365,365 365,” a local priest said to a nine-year-old boy.
True to the boy’s playful and lighthearted nature, he flew around the room, bit his hand and hoodwinked. It seemed like he took no notice of what the priest was saying.
But not a minute later, the little boy blurted out a bunch of numbers. He answered 133,491,850,208,566,925,016,658,299,941,583,225.
It turned out that the little boy was the math prodigy, Truman Henry Safford.
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An eight-year-old Zerah Colburn was asked to raise eight to its 16th power, to which he promptly replied 281,474,976,710,656. He gave the answer so fast that he was obliged by the gentleman who was taking his answer down to repeat it more slowly.
What is Delightful Digits?
Although most of us can never match the lightning virtuosity of Truman Henry Safford or Zerah Colburn in numbers, we can develop a talent for math using an informational trove such as Delightful Digits.
Delightful Digits is a book that is perfect for everyone who wants to run numbers through their head at lightning calculating speeds. Whether you are good or no good at math, this book offers easy techniques at mental math by helping you improve your mental agility and memory.
Amaze with Instant Subtractions
How long does it take you to subtract 357 from 1000? For some people, subtracting a number from 1000 can be a bit tricky. Delightful Digits offers a fast and easy approach:
1000
- 357
------
???
With the digits three, five and seven in line with the corresponding zeroes in 1000, assign nine for the numbers three and five, and ten for seven, then subtract accordingly, such as: (i) 9 – 3 = 6; (ii) 9 – 5 = 4; (iii) 10 – 7 = 3
After making the corresponding subtractions, drop one from the 1000. Thus, in the equation 1000 minus 357, we arrive at the answer, 643. This technique works when subtracting any amount from any number beginning with one and followed by zero/es (e.g. 10, 100, 1000, etc.)
More Step-by-Step Solutions for Easy Mental Math
Delightful Digits offers complete solutions to make it easy for you to perform basic mathematical equations involving big numbers in your head. With easy step-by-step solutions, Delightful Digits provides easy-to-understand explanations on how to answer each mathematical problem easily. What’s more, you can easily answer it without using a pen and paper. Or better yet, you will not need your calculator on this one. It’s all about doing math in your head.
Along with customized explanations for each example, Delightful Digits will help you at:
- Improving Your Skills at Adding Fractions
- Improving Your Skills at Subtracting Fractions
- Squaring Numbers That End in 5
- Adding Numbers from Left to Right
- Multiplying Numbers from Left to Right
- Long Multiplication
- Multiplying Number by 11
- Dividing Numbers by 9
Now, you can easily answer these math problems in your head with Delightful Digits:
2 1 6 2 4 5 3 6
-- + -- = ? -- - -- = ? -- + -- = ? -- - -- = ?
3 5 7 3 9 6 8 9
Delightful Digits will also provide a step-by-step explanation on to how perform these arithmetic problems in your head:
7 52 = ? 4 8 = ? 6 1 x 3 1 = ? 2 6 x 1 1 = ? 2 3 ÷ 9 = ?
8 52 = ? 8 5 = ? 1 8 x 2 4 = ? 8 8 x 9 8 = ? 4 0 ÷ 6 = ?
With these easy math methods, you can now abandon your old numbers methods, or your calculator. Delightful Digits shows simple methods that can be very useful in everyday situations. Subscribe now to learn more about these easy techniques.
Click here to go to Chapter III: Number Games!
