乘法的竖式计算

乘法练习

亠、多位数乘一位数的竖式计算

1、相同数位对齐

The same digital alig nment

2、用这个数分别去乘多位数每一个数位上的数，从个位数乘起，即从

右往左乘

Use this number, respectively ,to take each digit number,

multiply since single-digit multiplication. namely from right to left

3、乘到哪一位就把积写在哪一位数位对应的下面。

By which one to put a digital under the corresponding product 23X 3= 69 14X 2= 232 X 3= 1424X2= written in

23

X 3

69

4、如果要进位的，哪一位的乘积满几十，就向前进几，然后再继

续往下乘

Which one if you want to carry ,the product of the full scores, just

move forward a few ,and then continue to go by

15

x 6

90

1425X 9=

1、多位数乘两位数

1、把数位较多的乘数数写在上面，数位较少的写在下面

Write more digital multiplier number above,several less written

below.

2、下面的乘数要与写在上面的乘数的数位要对齐

The multipliers are aligned with the digital to write in the above multiplier.

3、用第二个乘数（即写在下面的乘数）的个位数与写在上面的数

的个位相乘，把相乘得到的积的末位写在个位上，再与上面十位上的数相乘积的末位写在十位上，……

With a second multiplier (that is,to write in the following

multiplier ）in single digits and write on it is multiplied by the nu mber of bits,the multiply by the bottom of the product of writte n

in the book of bits, and with the number on the top ten in the bottom of the product of written in the book of the ten…

4、要记住，哪一位的乘积满几十，就向前进几，然后再继续往下

乘

Remember that which one product of a few decades,full forward into a few ,and the con ti nue to go by

5、再用写在下面的乘数的十位与写在上面的乘数的各个位数分

别相乘，把相乘得到的积的末位写在对应的十位上。

With write multiplier of ten below and write in the above each digit of the multiplier multiply, write multiply by the bottom product on the corresp onding ten

6、最后将每次乘得的数加起来

The final will be riding have to add up the number

22X23=506

22 1、先用个位上的（）乘22,得（）X 23 2、用十位上的（）乘22,得（）

66 3、把（）与（）加起来得（）

47 X 20=

作业练习:

25 X 4= 3X 16= 56 X 134=