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CHAPTER 1 MENTAL ADDITION
In Mathemagics
workbook am going to show you how to
add and subtract from left to right that from right to left, which was the
way we had all been I teach. Suddenly I was able to drop the answers to math problems in class much earlier. My classmates left their
pencils. And I did not even need a pencil! The method was so simple that I did
most of the calculations in my head. Looking back, I admit that I did both to
show off and for any mathematical
reason. Most children outgrow such behavior. Those who probably do not become
teachers or magicians.
In this Mathemagics workbook chapter 1, you
will learn the method from left to right to do mental sums for Numbers that vary in size from two to four digits. These
mental abilities are not only important to do the tricks in maths games,
but they are also indispensable at school or at work, or at any time you use numbers. Soon you can withdraw your calculator and use the total capacity
of your mind as you add, subtract, multiply and divide 2
digits, 3 digits, and even 4-digit numbers.
Once you know about math facts and history of
mathematics you can make feel your brain faster like a computer and also Math Magic Tricks Amaze your Friends
and Play with Math Magic Tricks with
Numbers.
ADDITION FROM LEFT TO RIGHT
There are many good reasons why adding
from left to right is a superior method for Mental calculation, On the one hand, you do not have to reverse the
numbers (as it does When added from right to left). And if you want to estimate
your answer, and then add only the initial digits will bring you closer.
If you
are used to working from right to left in on paper, it might appear to be
unnatural to add and duplicate from left to right. But with practice, you will
find that it is the most natural and efficient way of doing mental calculations. With the first set
of problems, a sum of 2 digits, the method from left to right can not It seems so advantageous. But be patient. I’ll teach
you by playing with maths games.
If
you stay with me, you will see that the only an easy way to solve 3-digit and larger addition problems, all subtraction
problems, and definitely, all the problems of multiplication and division are
from left to right. As soon as you get used to computing in this way,
better.
Kids can learn easily & loves with math magic tricks, by Mathematics Magic Tricks anyone can
understand in a better way.
So how is going on with Maths Tricks!!! If you are not getting well read! Read! And read!
Until to know the fact of this Maths Tricks
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next sheet
ADDITION OF 2 DIGITS
In this Mathemagics workbook chapter, we are trying to show you that you
know how to add and subtract 1-digit
numbers. We'll start with a 2-digit sum, something I suspect you can do Pretty
good in your head the following exercises are good practice, however, because
Will use the 2-digit addition skills that you polish here for a larger sum
problems, as well as Virtually all multiplication
problems in later chapters.
It also illustrates a fundamental Principle of
mental arithmetic, that is, to simplify your problem by dividing it into Smaller
and more manageable components to simplify successfully, simplify, simplify the
easiest 2-digit addition problems, of course, are those that do not require it.
To carry any number. For example:
To add 32 to 47, you can simplify processing 32
as 30 + 2, and add 30 to 47 then
Add 2. In this way the problem becomes
77 + 2, equivalent to 79.
Keep in mind that the graph above is
just a way to represent the mindset Processes involved in reaching an answer
using one method. While you need to be able to read and understand these graphs
as you work your way through MATHS TRICKS site, we have
the method does not require you to write anything yourself.
Here Awesome Math
Magic Tricks with Numbers you haven’t found yet in some other math sites,
websites like Math Trick in Math Magic
Tricks Books also,
Now let's try a calculation that
requires you to load a number:
Here adding from left to right, you can
simplify the problem by adding 67 + 20 = 87; then 87 + 8 = 95.
It is uniquely designed with magical maths for you and your kid’s brainpower future.
Now try one on your own, calculate mentally from left to right,
and then review below to see how we did it:
No problem, right? Now you added 84 + 50
= 134 and also added 134 + 7 = 141.
If carrying numbers makes you stumble,
do not worry. This is probably the first time you make a systematic attempt at
mental calculation, and if you are
like most people, it will take you a while to get used to it. However, with
practice, you will begin to see and hear these numbers in your mind, and carry
numbers when you add them will come automatically. Try another problem for
practice, first change it mentally and then check how we did it:
I should have added 68 + 40 = 108, and
then 108 + 5 = 113, the final answer. No sweat, right? If you want to try more
2-digit addition problems, see the set of exercises below. (The answers and
calculations are at the end of the Mathemagics
workbook chapter).
Exercises: Addition of 2 digits.
3 -DIGITS ADDITION
The strategy for adding 3-digit numbers
is the same as for adding 2-digit numbers: you add from left to right. After
each step, a new (and smaller) addition problem is reached. Let's try the
following:
After adding the hundreds of digits of
the second number to the first number (538 + 300 = 838), the problem becomes
838 + 27. Then, add the ten digits (838 + 20 = 858), simplifying the problem to
858 + 7 = 865 this thought process can be diagrammed as follows:
All problems of mental addition can be worked using this method. The goal is to
continue simplifying the problem until you add a 1-digit number. It is
important to reduce the number of digits you are manipulating because short-term memory is limited to about 7
digits. Keep in mind that 538 + 327 requires that you stay with 6 digits in
your head, while 838 + 27 and 858 + 7 only require 5 and 4 digits,
respectively. As they simplify problems, problems become easier!
After learning easy
maths tricks your brain will be strong for solving any type of math quotations easily.
Try the following addition problem in
your mind before looking at how did:
Did you reduce and simplify the problem
by adding from left to right? After adding the hundreds digit (623 + 100 =
723), he had 723 + 59 left. Next, he should have added the digit of the tens
(723 + 50 = 773), simplifying the problem to 773 + 9, which easily added 782.
Diagram, the problem looks like this:
When I do these problems mentally, I do
not try to see the numbers in my mind, I try to listen to them. I hear the
problem 623 + 159 as six hundred and twenty-three plus one hundred and
fifty-nine; by emphasizing the word "one hundred" for me, I
know where to start adding. Six plus one equals seven, so my next problem is seven
hundred and twenty-three plus one hundred and fifty-nine, and so on.
When you do these problems for the first time, practice them out loud.
Reinforcing yourself verbally will help you learn the mental method much faster.
Fast
math
can change your speed of brainpower.
The addition problems really are not
much more difficult than the following:
Ok Now looks to see how we did it, below
the formula of maths tricks:
At each step, I hear (I do not see) a
"new" addition problem. In
my mind the problem sounds like this:
It is possible
that your mental conversation does not sound exactly like mine, but whatever
you say to yourself, the point is to reinforce the numbers along the way so you
do not forget where you are and have to start over with the problem of the sum.
Let's try another one
for practice:
This addition problem is a bit more difficult than the previous one,
since it requires you to carry numbers in all three steps. However, with this maths
tricks a particular problem, you have the option to use an alternative method.
I'm sure you'll agree that it's much easier to add 500 to 759 than to add 496,
so try adding 500 and then subtract the difference
So far, he has constantly divided the second number into any
problem to add to the first one. It
really does not matter what number you choose to divide as long as it's consistent. That way, your mind will never
have to waste time deciding which path to take. If the second number is much
simpler than the first one, I change it, as in the following example:
Let's finish by adding 3-digit numbers
to 4 digits. Again, since most human memory can only hold about seven digits at
a time, this is as big a problem as it can handle without having to resort to
artificial memory devices. Often (especially within multiplication problems)
one or both numbers will end in 0, so we will emphasize those types of
problems. We begin with an easy one with our formula of maths tricks:
Since 27 one hundred + five hundred are
32 hundred, we simply attach 67 to get 32 hundred and 67, or 3267. The process
is the same for the following problems:
Why because here 40 + 18 = 58, the first
answer is 3258? For the second problem, since 40 + 72 exceeds 100, you know
that the answer will be 33 hundred and something. Why because here 40 + 72 =
112, you end up with 3312.
These problems are easy because of the
digits only overlap in one place and, therefore, can be resolved in one step.
Where the digits overlap in two places, two steps are required. For example:
This problem requires two steps, as
described in the following way.
Well! Practice! Practice! Practice! The
following 3-digit addition exercises, and then add some of your own if you wish
(try it!) Until you feel comfortable doing them mentally without having to look
at the page.
Exercises: ADDING 3
DIGITS.
Still, if you have math trick questions then read
again carefully.
So how is going on with Maths Tricks!!! If you are not getting well-read! Read! And read!
Until to know the Mathemagics
workbook formulas, and do practical for easily understand then move ahead see you in
next sheet.
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2
RELATED CHAPTER 1, CHAPTER 2, CHAPTER 3, CHAPTER 4, CHAPTER 5