乘法的竖式计算.doc

格致教育 乘法练习一、 多位数乘一位数的竖式计算1、 相同数位对齐The same digital alignment2、 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 left3、 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 written in233= 69 142= 2323= 14242= 23 3 694、 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 by156=90 297= 2563= 15 6 9014259=二、 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 number of bits,the multiply by the bottom of the product of written 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 continue to go by5、 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 corresponding ten6、 最后将每次乘得的数加起来The final will be riding have to add up the number2223=50622 1、先用个位上的（ ）乘22，得（ ） 23 2、用十位上的（ ）乘22，得（ ） 66 3、把（ ）与（ ）加起来得（ ） 44 5