Here’s and example of a **SMART MATH** problem for **ARITHMETIC.**

**Problem**

**Problem**

How many integer solutions exists for the equation ?

- 0
- 1
- 2
- 3
- 4

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- Post author By LazyMaths.com
- Post date May 19, 2014
- 3 Comments on [Smart Math] Arithmetic Problem 27

Here’s and example of a **SMART MATH** problem for **ARITHMETIC.**

How many integer solutions exists for the equation ?

- 0
- 1
- 2
- 3
- 4

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- Tags Arithmetic, Math Tricks, Mental Math, Smart Math

Categories

- Post author By LazyMaths.com
- Post date May 17, 2014
- No Comments on [Speed Math] MULTIPLYING WITH 12

Here’s an example of a **SPEED MATH** shortcut for **MULTIPLYING WITH 12 : (Mul) Nx12** from the **MULTIPLICATION** category.

For multiplying any number with 12.

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** Download Practice sheet for MULTIPLYING WITH 12**

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- There is no real need to add the zero if you can remember to perform same steps for all the digits of the number (including the first and the last).
- Make sure to take care of the carryovers as you add the neighboring digits.

Multiplying with 11: (Mul) Nx11

Multiplying with 13: (Mul) Nx13

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- Post author By LazyMaths.com
- Post date May 5, 2014
- No Comments on [Speed Math] DIVIDING 2-DIGIT NUMBER BY 9

Here’s an example of a **SPEED MATH** shortcut for **DIVIDING 2-DIGIT NUMBER BY 9: (Div) Nd9(2d)** from the **DIVISION** category.

For dividing any 2-digit number by 9.

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** Download Practice sheet for DIVIDING 2-DIGIT NUMBER BY 9**

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- When the sum of the 2 digits is ≥ 9, further divide the sum using this method until you get the sum < 9. Add each Quotient you get along the way to get the final Quotient.
- If the sum of the 2 digits is = 9, add 1 to the Quotient and the Remainder becomes 0.

None

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- Tags Division, Math Tricks, Mental Math, Speed Math

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- Post author By LazyMaths.com
- Post date April 30, 2014
- No Comments on [Speed Math] MULTIPLYING WITH 999

Here’s an example of a **SPEED MATH** shortcut for **MULTIPLYING WITH 999 : (Mul) Nx999 ** from the **MULTIPLICATION** category.

For multiplying any number with 999.

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** Download Practice sheet for MULTIPLYING WITH 999**

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- The separator should be inserted before the hundred’s (100’s) digit.
- The complement of a number is what you need to add to it to make it up to some specified total – in this case 1000.

Multiplying with 9: (Mul) Nx9

Multiplying with 99: (Mul) Nx99

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Here’s an example of a **SPEED MATH** shortcut for **MULTIPLYING NUMBERS USING TRACHTENBERG METHOD: (Mul) NxMy(Tt)
**from the

For multiplying any number with any other number.

Ideally, the numbers should have digits of value less than 5. This, although not a restriction, but is helpful to draw out the lines clearly and count the intersection points properly.

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** Download Practice sheet for MULTIPLYING NUMBERS USING TRACHTENBERG METHOD**

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- This is one of the most generic methods of multiplication.
- As you would notice that it is not really a shortcut method, but just an alternative method of multiplication.

Multiplying Numbers using Grid Method: (Mul) NxMy(Gd)

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Here’s an example of a **SPEED MATH** shortcut for **MULTIPLYING NUMBERS WITH EVEN DIFFERENCE: (Mul) NxM(Ed)
** from the

method?

For multiplying any two numbers provided that the difference between the numbers is even.

Also make sure that the numbers are relatively near each other, so that squaring the difference and midpoint numbers is easy.

This method becomes a little difficult when the numbers are far apart or the midpoint of the numbers is not a round number.

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** Download Practice sheet for MULTIPLYING NUMBERS WITH EVEN DIFFERENCE**

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- This method uses the concept of (a + b)(a – b) = a2 – b2

Multiplying Numbers using Nearby Method: (Mul) NxM(Nr)

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- Post author By LazyMaths.com
- Post date December 28, 2012
- 1 Comment on [Speed Math] MULTIPLYING WITH 5

Here’s an example of a **SPEED MATH** shortcut for **MULTIPLYING WITH 5 : (Mul) Nx5** from the **MULTIPLICATION** category.

For multiplying any number with 5.

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** Download Practice sheet for MULTIPLYING WITH 5**

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- Make sure to insert the decimal correctly as you halve the number.

Multiplying with 25: (Mul) Nx25

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Categories

- Post author By LazyMaths.com
- Post date December 28, 2012
- No Comments on [Speed Math] MULTIPLYING WITH 13

Here’s an example of a **SPEED MATH** shortcut for **MULTIPLYING WITH 13 : (Mul) Nx13** from the **MULTIPLICATION** category.

For multiplying any number with 13.

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** Download Practice sheet for MULTIPLYING WITH 13**

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- There is no real need to add the zero if you can remember to perform same steps for all the digits of the number (including the first and the last).
- Make sure to take care of the carryovers as you add the neighboring digits.

Multiplying with 11: (Mul) Nx11

Multiplying with 12: (Mul) Nx12

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Categories

- Post author By LazyMaths.com
- Post date December 28, 2012
- No Comments on [Speed Math] MULTIPLYING WITH 99

Here’s an example of a **SPEED MATH** shortcut for **MULTIPLYING WITH 99 : (Mul) Nx99 ** from the **MULTIPLICATION** category.

For multiplying any number with 99.

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** Download Practice sheet for MULTIPLYING WITH 99**

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- The separator should be inserted before the ten’s (10’s) digit.
- The complement of a number is what you need to add to it to make it up to some specified total – in this case 100.

Multiplying with 9: (Mul) Nx9

Multiplying with 999: (Mul) Nx999

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Categories

- Post author By LazyMaths.com
- Post date December 28, 2012
- No Comments on [Speed Math] MULTIPLYING WITH 9

Here’s an example of a **SPEED MATH** shortcut for **MULTIPLYING WITH 9 : (Mul) Nx9 ** from the **MULTIPLICATION** category.

For multiplying any number with 9.

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** Download Practice sheet for MULTIPLYING WITH 9**

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- The separator should be inserted before the unit’s (one’s) digit.
- The complement of a number is what you need to add to it to make it up to some specified total – in this case 10.

Multiplying with 99: (Mul) Nx99

Multiplying with 999: (Mul) Nx999

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