66 29 How do you count it? How many algorithms is 66 29 equal?

66-29 vertical calculation.

Problem solving ideas: align the subtraction with the subtracted number, subtract the number from the corresponding counting unit respectively, if it is not enough to subtract, you need to borrow 1 from the high position, and calculate the result in turn, the subtraction is less than the subtracted number, and the final result of the two numbers will be converted and subtracted by adding a negative sign;

Problem solving: Step 1: 16-9=7 borrowing.

Step 2: 5-2=3

Step 3: The result is 37

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

This can be seen as 29 as 30, then 66-30, plus 1=37.

You can calculate it directly. Or take the whole method, for example, take the integer from 66 to 30, then there is 36, 30 29 1, so there is 1+36 37, in fact, I think that if you are proficient, you can calculate it directly by using the decimal method.

You can first count 29 as 30, 66-30=36

Because 29 is considered to be 39 and 1 is overcounted, the above result needs to be 36-1=35

Oral arithmetic can be thought of in this way, first use 66-30 = 36, 36 + 1 = 37

There are several algorithms:

First, according to the normal calculation of the general addition and subtraction algorithm, the single digit 6 plus the single digit 9 is enough for 10 into 1, the ten digit 6 plus the ten digit 2, plus the single digit into 1, 66 + 29 = 95.

Second, make up ten methods, 66 + 29 = 66 + 4-4 + 29 + 1-1 = 70 + 30-4-1 = 100-4-1 = 95.

Three, 66 + 29 = 60 + 6 + 20 + 9 = 80 + 6 + 9 = 86 + 9 = 95, four, 66 + 29 = 65 + 1 + 25 + 4 = 90 + 1 + 4 = 95.

5. 66 + 29 = 66 + (30-1) = 66 + 30-1 = 96-1 = 95.

The above is the basic part of the calculation method of this question, if you score in detail, you can continue. However, it is not representative, so I will not list them one by one.

66+29 is equal to 95, which is an addition, and there are no multiple algorithms.

There are three algorithms: the first oral arithmetic first calculates 60 20 80, 6 9 15, and then 80 15 90;the second is calculated vertically; The third kind of pendulum stick (full of ten to tie a bundle) is calculated.

First 4 times 6, then 4 times 2, then 4 times 2, then use the 4 on the ten digits to multiply 6, then 4 times 2

1. Borrow 19 to become 29, that is, subtract 1, and add the subtracted 1 to the 10th place of 69 at the same time.

2. Then use the vertical calculation method, start from the single digit, calculate 9-9=0 first, and write it on the single digit.

3. Then, calculate the rubber code out of 7-1=6 and write it on the ten digits.

4. From this, it can be obtained, 69-19=50. Therefore, 69-19 = 50.

The answer is 1541.

If you want to multiply the single digit by 3*7=21, the mantissa is 1, the ten digits are in, and 4 is in the upper digit. The mantissa is 8, and the 6 added up to get 10, 0 is the number in the ten place, and 1 is advanced to the previous digit, which is equivalent to 7 to the previous digit. 2 6 12,2 and 7 up add 13, 3 is the number in the hundred, 1 into the previous digit, so that 1 into the previous digit.

The result was 1541.

The multiplication mouth calculation speed calculation technique is the two-digit multiplication method with the same ten digits and complementary single digits, ten digits plus one by ten, and the single digits multiplied and written behind. Tens of digits are complementary, two-digit multiplication with the same single digit, multiplication of ten digits plus single digits, and multiplication of single digits is written later.

39 ten () = 67, the addition of the addition is equal to the sum, find the other addition (), then subtract the addition of 39 with and 67, that is, () = 67 - 39 = 28.

Split the number method, split 11 into 10 + 1, subtract 10 first, and then subtract 1 from the difference obtained

, this belongs to the division operation, then we can calculate it through the division operation of the vertical calculation, and the answer we get is.

How to calculate the division vertical first divide from the high position of the dividend, there are several divisors, the base calendar looks at the first few digits of the dividend, if it is not enough to divide, look at one more. Divide to which digit of the divisor is searched purely, write the quotient in the middle of the trousers of which digit, if it is not enough to divide, it is on this quotient 0The remainder of the division must be smaller than the divisor, and the number of the dividend-being in this digit falls to the right of the remainder.

27-59+66 can be sibling operations. It belongs to the same shirt as the level of operation, directly from the left state not to the right in order to calculate, that is, the sail collapses. 27-59=-32, -32+66=34, so the answer to this question is 34.