At Last....DECIMALS!!!

The time is here were we come to the last post of this blog.  This last post I wanted to focus on a topic that can be difficult to a lot of students. The DECIMAL!!! Some children and adults find the period very intimidating because when multiplying decimals together you are not only trying to figure out the correct numericals, but you also have to know if you can leave the decimal in its place or move the decimal to a different position of the number.





With the example, as a student I would atutomiatically get confused because you have some problems with decimals being multiplied by whole numbers and by other deceimal numbers, but the decimals are lined up together.  So first we have to go over the stepts to multiplying with decimals.

Steps to Multyiplying Decimals:

1. Multiply like whole numbers.

2. Count decimal places in the problem.

3. Put the same number of places beind the decimal in the product.

Here below is an example of how two decimals would be multiplied together.




From the very first problems that was given above the student would have to multiply

a. 4.6                b. 3.9                 c. 14.56
   x  7                  x5.6                    x   2.8

  32.2                   234                    11648
                          1950                    29120
                         21.84                   40.768

Another way to try to figure out where the decimal point goes and that is by rounding the two multiplying numbers to the nearest whole number. After solving the product of those two numbers that is where you will place your decimal point. I found this way by watcing this video that is provided below.

Perform operations with multi-digit whole numbers and with decimals to hundredths.

CCSS.MATH.CONTENT.5.NBT.B.7
Add, subtract, multiply, and divide decimals to hundredths, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used.