The Mathematical formulas Operation Count Numbers nature Distributive

Intellectual Greetings, This time I post material math arithmetic operation numbers for you who are still in the 4th grade. Well on this occasion I will memjelaskan part of the operating material coun number that is distributive. What does it mean distributive it? nah to know the answer please understand the following example:
* Ema and Menik go to the market to buy citrus fruits. They masing2 buy 4 kilograms and 5 kilograms. For every kilogram comprises 8 oranges.
How many oranges they buy?
nah let us solve the above problems. We try to use 2 as follows.

Method 1:
Many oranges that have been purchased Ema and Menik are:
4 kg + 5 kg = 9 kg
Each consisting of 8 kg of citrus fruit, so much
orange purchased Ema and Menik are: (4 + 5) x 8 = 9 × 8 = 72 pieces

Method 2:
Many oranges purchased Ema = 4 × 8 = 32 pieces
Many oranges purchased Menik = 5 × 8 = 40 pieces

Many oranges purchased Ema and Menik = 72 pieces
If written using mathematical sentence becomes: (4 × 8) + (5 × 8) = 32 + 40 = 72

You can see the result of the way the 1 and 2 are the same way. From these results we can write:
8 × (4 + 5) = (8 × 5) + (8 × 4)

Now, properties such as the above explanation is called the nature of the grouping / distributive property. From this example, the combined effect on the distributive property of multiplication and addition operations.

In addition, the distributive property also applies to the combined operations of multiplication and subtraction. You can prove it by doing the following operations.

   Column 1 Column 2
9 × (8-2) = .... (9 × 8) - (9 × 2) = ....
5 × (4-3) = .... (5 × 4) - (5 × 3) = ....
2 × (9-7) = .... (2 × 9) - (2 × 7) = ....
4 × (1-2) = .... (4 × 1) - (4 × 2) = ....
6 × (7-5) = .... (6 × 7) - (6 × 5) = ....

Surely you get the same answer in the second column. So that we can determine the nature of the spread or distributive property as follows.

a × (b + c) = (a × b) + (a × c)
a × (b - c) = (a × b) - (a × c)

Now that's a bit of an explanation of the mathematical material number arithmetic operations using distributive property, useful smoga yah ,,,, and his later you can also see the material associative arithmetic operations, Apasih Associative it? Curious? yah later in the next post .. okeey

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