An easy way to 217 dec 325 dec 387?

The simple algorithm for this problem could look like this.

Four mixed operations: 217 + 325 + 387

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 data (calculation result): the single digit of the two additions 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 level needs to accumulate the result of the low position to 1.

Problem solving process: Step 1: 2+7=9

Step 2: 4+8=2 Advance 1 to the high position

Step 3: 5+3+1=9

According to the above calculation steps, the combined calculation result is 929

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

Simple algorithm of 217+325+387: With the method of making up ten, because the mantissa of the last number is 7, then, you can write the first number 217 as 213+4, so that the column calculation is convenient, and the column formula :(213+4)+325+387

The simple operation of equation 217 + 325 + 387 is as follows:

The first formula becomes 300-83, the second formula becomes 3000+25, and the third formula becomes 300+87. Now the problem-solving process is filmed as follows.

364-387 +187 can be easily arithmetic with associative properties.

1. If there are overlapping digits between the subtraction and the addition in the question, you can consider combining the two.

2. When adding parentheses, pay attention to the symbols in the parentheses to change according to the content, such as the original addition to subtract, multiplication to division, etc.

3. After the calculation of the question is completed, the calculation should be checked to ensure that the process is accurate.

The easy way to answer this question should be like this.

In this way, 87 is directly zero.

It's going to be simple.

The easiest way can be to use 600 minus 200 is equal to 400, in the use of 42 minus 3 is equal to 39, and then 400 plus 39 is equal to 439, socks finger above is 642 minus 203 Yu Haohong simple square vertical book method.

327+33+273+267=900

That's how it turned out.

For 327+273, adding 33+267 equals 600+300 equals 900.

Solution: 364-187 + 36-321 is equal to ( -108 ) How much is known to demand out 364-187 + 36-321 is equal to a + b + c = a + c + b 364 - 187 + 36 - 321 = (364 + 36) + 187 - 321) = 400 - 508

Answer: 364-187+36-321 is equal to -108

385+276-185+124 Easy calculation?

Solution: original formula = (385-185) + (276 + 124) = 200 + 400

Calculations are made using the additive associative (also commutative) associativity.

Hello, easy calculations using the commutative law of addition.

Original = (385 + 15) + (276 + 124 ) = 400 + 400