****Place Value to learn the group names from right to left **

**T**rillions,

**B**illions,

**M**illions,

**T**housands,

**O**nes

From right to left:

**O**rangutans

**T**ickle

**M**y

**B**ig

**T**oe

These mnemonics were created by former students:

**O**ur

**T**eacher

**M**ust

**B**reak

**T**hrough

**O**ne

**T**oo

**M**any

**B**aseball

**T**eams

Place value from Ones to Billions (

**O**ne

**T**oo

**M**any

**B**ills)

**** 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

****Rounding**

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

**OR**

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**

**D**ifferent signs Find the

**D**ifference

**A**like Signs

**A**dd

****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...