An easy way to 78 2 0 25 21 2 4?

Easy calculation,.

Simple calculation idea: If we do simple calculation, we can use the distributive property of multiplication operation or the properties and laws of associative law or division operation to calculate, and get the effect of our simple calculation. If you want to simplify and calculate here, you can try to convert the division operation into a multiplication operation, and then put 4 out, and then do the calculation in parentheses, which will be easier.

The detailed simple calculation process is as follows, so you can get the answer through the simple calculation process above.

Extended information: Problem solving ideas: When calculating the vertical calculation multiplication operation, first multiply the first digit of one digit by another digit to get a one-step answer.

Then multiply the low to the high digit by another digit to get a few steps of the answer. Finally, add up all the answers you get to get the final answer.

Step 1: Step 2: 9 4 = 36

Step 3: 90 4 = 360

Step 4: Accumulate and add the surface three steps to calculate the answer, get.

So, by multiplication of vertical calculations, the answer is yes.

Four arithmetic.

Solution: Four rules of operation (calculated in order, multiplication and division first, then addition and subtraction, parentheses are counted first, and power is calculated first), that is, the off-form operation (recursive equality calculation) needs to be carried out under the premise of this principle. Problem solving process:

Extended Information Vertical Calculation - Calculation Result: The single digit of the two added numbers is aligned, and then the numbers on the same counting unit are added together, and the addition result is 10 to the high position, and the addition of the high position needs to accumulate the result of the low position to 1.

Problem solving: Step 1: Advance 1 to the high position and add the decimal part.

Step 2: 2+4+1=7

Step 3: 1+8=9

Step 4: 3+0=3

According to the above calculation steps, the combined calculation result is as follows.

If you have any doubts, please ask and be satisfied.

Easy calculation is what it becomes later.

In this problem, first of all, Mazhou Que simplifies the division by the muffled argument eight to multiply 1 8, that is, multiplication, and then uses the distribution rate of multiplication to change the lion into a simple operation.

Because Nahuai 8 + 2 = 10, 1 + 9 = 10 Dong Kaiyou is calculated by Sun Xian to make up ten.

So we can calculate in detail from the simple calculation process above and get the answer yes.

Subtracting it is the easiest.

It's really not good, the calculator counts, it's the easiest.

After removing the brackets, use the orange vertical limb to make up the ten method. Namely.

When removing brackets, the world pays attention to the modification of the symbol.

Hello, it is easier to put the two numbers that can be made up into a whole hole to search for tens in an oak mess.

Thank you for your consultation and wish you a happy life.

Remove the parentheses.

Replace the position of Zhao Queqin.

This year-old scum is considered to be a family.