How to Multiply 2 Digit Numbers By 2 Digit Numbers

 When you first start to multiply a two digit by a two digit, you multiply the ones by the ones. If it has two digits, carry the digit in the tens place over. Then you would
                                                                        add it to the product.
Example:  13                                                  The second step is to multiply the tens by 
                x12                                                  the ones. If it has 2 digits, write both        
                                                                         below the number.
Step 1: Ones x Ones                                      On the third step, mark out the ones and
                                                                         add a zero on a new row. You do this  
                     13    3x2=6                                because you are moving a place over.
                   x12                                                  The fourth step is to multiply the ones 
                       6                                                by the tens. Stay on this new row you 
                                                                         created in the last step. This step and the
Step 2: Tens x Ones                                    fifth are just like the two except for that
                     13                                               you are multiplying in the tens, not the
                   x12      1x2=2                              ones. 
                     26                                                   Then, like the second step in a way,                                                                          you multiply the tens by the tens. You
                                                                         will still continue to stay on the new 
Step 3: Mark out ones, add 0                    row. The last step is to add up both the 
                      13                                               rows. The product is the sum of the 
                    x12                                               two numbers.
                      26
                        0

Step 4: Ones x Tens
                      13    3x1=3
                    x12
                      26
                      30

Step 5: Tens x Tens
                      13    1x1=1
                    x12
                      26
                    130

Step 6: Add
                      13
                    x12
                      26
                  +130
                    156

Watch my video for more:
https://www.youtube.com/watch?v=NLHCl6RGS74

                    

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Math Trick #4- Changing Some Fractions Into Decimals

Sometimes when converting a fraction into a decimal you have to use a calculator, especially when it is a repeating decimal. Most fractions that have an odd number as a denominator are equal to repeating decimals. There are three different groups of fractions with odd numbers equal to repeating decimals that you will know how to convert after learning this trick.

3rds Trick: A fraction below 1 with a 3 as the denominator will only work with this trick. Multiply the numerator times the denominator. The sum is the number repeating. Remember that there are no wholes because it is a fraction.
Example:                                           
2           2x3=6, so the answer is 0.6     (repeating) 
3

9ths Trick: A fraction below 1 with a 9 as the denominator will only work with this trick. The numerator is the number repeating. Remember that there are no wholes because it is a fraction.
Example:                                                                  
5          5 is the numerator, so the answer is 0.5    (repeating)
9
11ths Trick: A fraction below 1 will a 11 as the denominator will only work with this trick. You multiply the numerator times nine. The sum is the number repeating. Remember that there are no wholes because it is a fraction.
Example:
 7                                                                                      
11         7x9=63, so the answer is 0.63     (repeating)

Social Studies Trick #1- Remembering Stock

Want to know an easy way to remember the the definition of 'stock?' When you think of the word, think about the 's' being a dollar sign ($.) Then you know that stock involves spending money to buy parts of a corporation.

Reading Tip #1- Remembering What You Read

Sometimes, it may be hard to remember what you read. It happens to me a lot. I figured out that if you read in short chunks or phrases, it makes it easier to remember. I put an example below that I read. The slashes are where you pause. Two slashes in a row means the end of a sentence. I found it much easier to remember.

What started out/ as a normal day/ would soon turn into/ one of the most unusual days/ Joe had ever had.// His mom came in/ and woke him up at 7:10/ so he could get ready/ for school.// Breakfast was the same cereal/ he ate every day/ along with an orange/ and a glass of juice.// As he left,/ he grabbed his homework/ and backpack.// He told his mom/ that he had a basketball game/ that night.//

When we were asked these questions, we knew all the answers without looking back:
What time did his mom wake Joe up?
What was for breakfast?
What did he grab as he left?
What did he tell his mom?
This takes longer, but it helps you remember it better, as long as you find the right place to pause.

Math Trick #3-Double Checking

This trick is also simple, like Math Trick #2, but may be hard to understand. If you are trying to find an equivalent fraction, this might help, but this will only work if one of the fraction's numerator and denominator are 1 piece apart, like 1/2. 1 is only one away from 2. Then, the number you multiply by to get the numerator/denominator will be how far away the numbers are in the equivalent fraction. Take an easy fraction such as 2/3. Notice how the numerator and denominator are only one piece apart. Then if you were to find a equivalent fraction by multiplying by 3, you can use this trick. 2 x 3= 6 and 3 x 3= 9, so the equivalent fraction would be 6/9. If you wanted to double check, you can see 9-6= 3, and 3 is the number you multiplied by. This will work every time if you are finding a equivalent fraction, and one of the fraction's numerator and denominator are 1 apart.

Another Example:
3 x 5 = 15
4 x 5 = 20           20-15= 5      5 is the number we multiplied by.

Math Trick #2- Halving Even Numbers With Odd

This trick is very simple. To figure the half of an even number can be easy, but other times harder. When dividing a two-digit even number, all you have to do is half both numbers. What if the first number is an odd number? This does not make it an odd number all together. You use the method of borrowing in subtraction to help you out, but you will never subtract. Let's say the number is 56. When you use that method, one less than 5 is 4, so you change the first part to a 4. Then bring over your one in front the six, to make it sixteen. Half of 4 is 2, and half of 16 is 8, so your answer is 28. Now I know 56 divided by 2 is 28.