What easy way to use 63x67

1.A dozen times a dozen:

Formula: head by head, tail by tail, tail by tail.

Example: 12 14=?

Solution: 1 1=1

Note: Multiply the single digits, and use 0 to occupy the place if the two digits are not enough.

2.The heads are the same, the tails are complementary (the sum of the tails is equal to 10):

Formula: After adding 1 to a head, the head is multiplied by the head, and the tail is multiplied by the tail.

Example: 23 27=?

Solution: 2 1 3

Note: Multiply the single digits, and use 0 to occupy the place if the two digits are not enough.

3.The first multiplier is complementary, and the other multiplier number is the same:

Formula: After adding 1 to a head, the head is multiplied by the head, and the tail is multiplied by the tail.

Example: 37 44=?

Solution: 3+1=4

Note: Multiply the single digits, and use 0 to occupy the place if the two digits are not enough.

4.Tens of one by dozens of one:

Formula: head by head, head by head, tail by tail.

Example: 21 41=?

Solution: 2 4=8

Multiply by any number: formula: the end does not move down, and the sum of the middle pulls down.

Example: 11 23125=?

Solution: 2+3=5

2 and 5 are at the beginning and end respectively.

Note: and full ten to one.

6.A dozen times any number:

Example: 13 326=?

Solution: 13 digits are 3

Note: and full ten to one.

Easy way to 33x68 + 66x16.

Apply the multiplicative distributive property.

Extended Information: Multiplicative Distributive Property:

Adding (or subtracting) two numbers and multiplying another number is equivalent to multiplying the number by two additions (subtractions) respectively, and then adding (subtracting) the two products to give the same number.

Indicated by letters:

a+b）× c=a×c+b×c

Variant: (a-b) c=a c-b c

33 68+66 16 There are two simple algorithms. Method 1:

Method 2: Hope, thank you!

This question is mainly to split 66*16 into 33*(16*2).

The simple calculation process is as follows: Song Kai repents Sun lead: Ye Zheng

Using the distribution law of the multiplicative beam method, 69 becomes 23*3, 46 becomes 23*2, and the roll sells 23*3*36+23*2*46=23*108+23*92=23*(108+92) Rubber Tung = 23*200=4600, and the answer to the equation is 4600

Observe and find the number 23, and then change it to 23 * 3 * 2 * 18 + 23 * 2 * 46 to 23 (108 + 92) or 23 * 2 (54 + 46) nuclear potato to shake the hand of J-4600

It's all about observation.

This problem needs to be calculated with a simple calculation, and the calculation process is as follows. Original = 66x(57-43)=66x14,=66 (10+4)=66 10+66 4 is equal to 660 plus (60+6)x4=660+60 4+6 4, which is equal to 660 plus 240 plus 24. Equal to 900 plus 24 = 924.

So the final result of this question is 924.

In this question, because there are 66 in both items. So let's consider bringing 66 up. This gives 57-43=14.

It is also more troublesome to use 66 14 again, so turn 14 into 10+4, and then multiply it with 66 to get 660, plus 66 4. And 66 4, you can turn 66 into 60 + 6 and then 4 in parentheses. This gives 240 plus 24.

In this way, 660+200 is exactly equal to 900. Then add 24 and you will equal 924.

The calculation process of this question is as follows:

Simple calculations can be performed using the distributive and associative properties of addition, subtraction, multiplication and division:

66x57-43x66

66x(57-43)

66x14(70-4)x14

70x14-4x14

Since there are 66 in both cases, 66 can be raised, 66 57-43 66

The original question cannot be easily calculated, it should be 66 57+43 66 66 (57+43) 66 100 6600