Mnemonic is a memory aid used to make a connection between what you know and what you want or need to know. Basically, take the first letter of a series of words and make a sentence. This article will share mnemonics and other memory tips for math, Pre-Algebra in particular.
**Place Value to learn the group names from right to left
Trillions, Billions, Millions, Thousands, Ones
From right to left:
Orangutans Tickle My Big Toe
These mnemonics were created by former students:
Our Teacher Must Break Through
One Too Many Baseball Teams
Place value from Ones to Billions (One Too Many Bills)
** Front End Rounding
The word front means to round to the front numbers place value.
Example: 354 would round to the hundreds place
36 would round to the tens place
Example: round 463 to the tens place
The 6 is in the tens place; look at the next number to determine whether to change the 6 to a 7 or leave it as a 6.
Memory tip: if the next number is five or more, go next door (meaning go to the next number)
Instructify.com voted learnmegood2.blogspot.com s Punch it up as their best mnemonic.
Basically, you need five fingers to make a fist and to punch it up. For instance, 467 rounded to the tens place requires us to analyze the 7. Seven fingers will make more than a fist, thus you can punch it up to 470. For more details read, http://instructify.com/category/mnemonic/
**Multiplying and Dividing with Negative numbers
Compute two numbers at a time same signs the result is positive
- Different signs the result is negative
- Two negatives make a positive
Ignore signs and just multiply or divide. Then, count the number of negative signs.
An odd number of negative signs - the result is negative
An even number of negative signs the result is positive
**Adding with Negative Numbers
Different signs Find theDifference
Alike Signs Add
**Subtracting with Negative Numbers
Change /Transform into an addition problem and follow addition rules
Transform by changing two things
- change subtraction operand to an addition operand
- change the sign of the next number
- Example: -3 5 = -3 + (-5)
Memory tip to remember how to transform Add a Line
Change a Sign
More to come...