SHORT TRICK TO MULTIPLY ANY TWO DIGIT NUMBER BY 11.

This post is made to learn “How to multiply, in your head, any two-digit number by eleven?” It’s very easy once you know the secret.

Consider the problem:

32 x 11

To solve this problem, simply add the digits, 3 + 2 = 5, put the 5 between the 3 and the 2, and there is your answer:

352

Now you try:

53 x 11

Since 5 + 3 = 8, your answer is simply

583

One more. Without looking at the answer or writing anything down, what is

81 x 11?

Did you get 891? Congratulations!

Now before you get too excited, I have shown you only half of what you need to know. Suppose the problem is

85 x 11

Although 8 + 5 = 13, the answer is NOT 8135!

As before, the 3 goes in between the numbers, but the 1 needs to be added to the 8 to get the correct answer:

935

Think of the problem this way:

835

935

Here is another example. Try 57 x 11.

Since 5 + 7 = 12, the answer is:

527

627

Okay, now it’s your turn. As fast as you can, what is

a.) 83 x 11? b.) 78 x 11? c.) 28 x 11? d.) 63 x 11?

If you got the answer 913,858, 308, 693 respectively then give yourself a pat on the back. You are on your way to become a mathemagician.

Comments

REAL LIFE APPLICATIONS OF AREA | REAL LIFE MATH

As you probably know- "Every real-world object and every geometrical figure that is not a point or a line has a surface. The amount or size of that surface is called the object’s or figure’s area." but, have you ever thought what could be the real life applications of area? In this post you are going to know about the Real Life Applications of Area. 1.) DRUG DOSING The amount of a drug that a person should take depends, in general, on their physical size. This is because the effect of a drug in the body is determined by how concentrated the drug is in the blood, not by the total amount of drug in the body. Children and small adults are therefore given smaller doses of drugs than are large adults. The size of a patient is most often determined by how much the patient weighs. However, in giving drugs for human immunodeficiency virus (HIV, the virus that causes AIDS), hepatitis B, cancer, and some other diseases, doctors do not use the patient’s weight but instead use the patien...

SHORT TRICK TO MULTIPLY ANY TWO DIGITS NUMBERS.

You should observe to learn the working of this method. Step - 1: Multiply the unit digits (rightmost digits) of both the numbers, Step - 2: Add the cross product of the digits as shown below: Step - 3: Multiply the ten’s digits (leftmost digits) of both the numbers. Note: If the results obtained in step 1 and step 2 have more than one digit, note down the unit place of the result and carry over the ten’s place of the result to the left. Let us understand the process through some examples: Example 1: Solve 13 × 12 Step - 1: Multiply the unit digits (rightmost digits) of both the numbers, Step - 2: Add the cross product of the digits as shown below: Step - 3: Multiply the ten’s digits (leftmost digits) of both the numbers. So,13 × 12 = 156 Now before you get too excited, I have shown you only half of what you need to know. Suppose the problem is Example 2: Solve 28 × 35. Step- 1: Multiply the unit digits (rightmost digits) of both the numbers, Step - 2: Add the cross product of the digi...

PYTHAGORAS OF SAMOS

Pythagoras of Samos (ca. 580–500 BCE) was a great Greek mathematician. As a young man, he was coached by the aging Thales, and he would continue the Greek quest to turn the mathematics of the Egyptians, Babylonians, and early Indians from a practical computational discipline into a beautiful, abstract philosophy. It was Pythagoras who gave us the ubiquitous Pythagorean theorem, which allows us to determine the length of a right triangle’s hypotenuse. Today GPS and maps use this theorem—as well as our very early understanding of numbers and of geometry—to compute distances between two locations. Pythagoras was born on the Greek island of Samos, a stone’s throw from the Anatolian Plateau of Asia Minor, which at that time was also part of greater Greece. The island is home to the Temple of Hera, one of the Seven Wonders of the Ancient World (although, unlike the almost-intact Great Pyramid, this temple has only one marble column still standing). Today the main town on the island is ...

Maxzone Academy

Search This Blog