This is done below in BLUE. Almost there! Now multiply the second digit of the first number by the second digit of the second number. Now for the final step, just add those three values together.

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So, if you can do single digit multiplication and addition inside your head, you can multiply two numbers between 11 and 19 inside your head as well! Now you have a neat new trick to impress your friends. What we just did might also be called an algorithm, or as we defined earlier: a step-by-step procedure for solving a problem. Algorithms can be applied to much more than just math or computer programming, they can be applied to your ever day life in many different fashions.

## Math Trainer

Any time you come across a problem that might seem insurmountable, go ahead and break it down into smaller steps. So, next time you must metaphorically eat an elephant, it might go a little something like this:. Which will leave you feeling more like this:. Become a member.

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## Math Trainer — Practice Mental Math

Comece a ler Secrets of Mental Math no seu Kindle em menos de um minuto. Tente novamente mais tarde. Formato: eBook Kindle Compra verificada. Highly recommend. Compra verificada.

## Mental Math Test (Easy)

I ordered this book a while back but never got time to read it. I started reading it last week and have been doing an hour a night during bed time.

I'm blown away by how simple the author makes things. I can do many mental math calculations and people are confused as to how I'm doing it so fast. My 9 year old pulls out his calculator and tests me on calculations, then he asks me to show him how I done it. He can do the multiplying by 11, and squaring numbers.

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His teacher was blown away that he could do the calculations so fast and gave him a gold star in class. I've told him "sssssh keep it a secret, don't tell anyone how you're doing it".

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Awesome book. I used this book studying for a job interview It takes time to be good at mental maths and its for someone who really want to push them selves. Amazing book! Sat up in bed reading it now! I have an interest in maths and have been trying to sharpen up my mental skills. If you want to do this too, then this is the place to get started! The authors make the book accessible and fun, and I find myself eager to learn a new skill each day.

Want to improve your math skills with out having to memorize a hundred tricks? Mental Math Cards is designed to help people of all skill levels improve their arithmetic abilities through easy to remember and use tips, practice question sets, and an addictive game. Unlike many other math apps, advanced problems are also supported to keep things challenging as your skills improve. The Game Center features allow you to test your skills against the rest of the world and to share your scores and accomplishments with friends.

Mental Math Cards provides step by step instructions on how to approach solving all of the problems it shows - for all operations and difficulty levels. Each difficulty level for each operation type is carefully thought out to build on the skills mastered in previous levels. For instance, hard multiplication problems are shown to be solvable by breaking problems down into medium and easy level problems.

Many tests don't allow for calculators, and greater comfort with arithmetic will still improve your scores even if calculators are allowed. Professionals: Impress colleagues, family, and friends with lightening fast and accurate mental math skills. Impress interviewers during job interviews that have quantitative component by solving problems with out needing a pencil and paper.

Mental Math Cards supports 1 by 1, 2 by 1, 2 by 2, and 3 by 3 digit problems. Mental Math Cards supports all four of the major arithmetic operations - as well as a mixed operations mode that randomly shows all types of problems. This is an excellent implementation of it and works just the way I was hoping. It includes a lot of well written instructions on how to master the tougher problems. Most adults forget half of what they have learned in school. Like most things if you don't use it you forget it.

This is a cool fun way to keep those Math juices flowing! Numerous updates: - Improved formatting - Fixes to hard level addition. Pretty good app to keep up on your math facts.