The table of 81 is a great way to not only get comfortable with larger numbers, but also helps you practice your multiplying. At first, it may seem a little large, but after practicing, you will find that the table of 81 takes on a nice pattern that is easy to adapt to.
This table has practical applications when you use it in everyday life. For example, if you had 81 chairs in each row of an auditorium-type setting, and there were 6 rows, it would be easier to calculate multiplication (81 × 6 = 486) than it would be to add 81 to itself six times (81 + 81 + 81 + 81 + 81 + 81 = 486).
When you learn the table of 81, you will not only improve your math work speed, but as you learn this, you will also develop better mental math skills for school work, on exams, or when you simply need to write the math as fast as you can!
Multiplicand | Operation | Multiplier | Result | |
81 | x | 1 | = | 81 |
81 | x | 2 | = | 162 |
81 | x | 3 | = | 243 |
81 | x | 4 | = | 324 |
81 | x | 5 | = | 405 |
81 | x | 6 | = | 486 |
81 | x | 7 | = | 567 |
81 | x | 8 | = | 648 |
81 | x | 9 | = | 729 |
81 | x | 10 | = | 810 |
81 | x | 11 | = | 891 |
81 | x | 12 | = | 972 |
81 | x | 13 | = | 1053 |
81 | x | 14 | = | 1134 |
81 | x | 15 | = | 1215 |
81 | x | 16 | = | 1296 |
81 | x | 17 | = | 1377 |
81 | x | 18 | = | 1458 |
81 | x | 19 | = | 1539 |
81 | x | 20 | = | 1620 |
81 times 1 equals 81
81 times 2 equals 162
81 times 3 equals 243
81 times 4 equals 324
81 times 5 equals 405
81 times 6 equals 486
81 times 7 equals 567
81 times 8 equals 648
81 times 9 equals 729
81 times 10 equals 810
81 times 11 equals 891
81 times 12 equals 972
81 times 13 equals 1053
81 times 14 equals 1134
81 times 15 equals 1215
81 times 16 equals 1296
81 times 17 equals 1377
81 times 18 equals 1458
81 times 19 equals 1539
81 times 20 equals 1620
In words:
Eighty-one times one equals eighty-one
Eighty-one times two equals one hundred sixty-two
Eighty-one times three equals two hundred forty-three
Eighty-one times four equals three hundred twenty-four
Eighty-one times five equals four hundred five
Eighty-one times six equals four hundred eighty-six
Eighty-one times seven equals five hundred sixty-seven
Eighty-one times eight equals six hundred forty-eight
Eighty-one times nine equals seven hundred twenty-nine
Eighty-one times ten equals eight hundred ten
Eighty-one times eleven equals eight hundred ninety-one
Eighty-one times twelve equals nine hundred seventy-two
Eighty-one times thirteen equals one thousand fifty-three
Eighty-one times fourteen equals one thousand one hundred thirty-four
Eighty-one times fifteen equals one thousand two hundred fifteen
Eighty-one times sixteen equals one thousand two hundred ninety-six
Eighty-one times seventeen equals one thousand three hundred seventy-seven
Eighty-one times eighteen equals one thousand four hundred fifty-eight
Eighty-one times nineteen equals one thousand five hundred thirty-nine
Eighty-one times twenty equals one thousand six hundred twenty
81 × 1 = 81
81 × 2 = 81 + 81 = 162
81 × 3 = 81 + 81 + 81 = 243
81 × 4 = 81 + 81 + 81 + 81 = 324
81 × 5 = 81 + 81 + 81 + 81 + 81 = 405
81 × 6 = 81 + 81 + 81 + 81 + 81 + 81 = 486
81 × 7 = 81 + 81 + 81 + 81 + 81 + 81 + 81 = 567
81 × 8 = 81 + 81 + 81 + 81 + 81 + 81 + 81 + 81 = 648
81 × 9 = 81 + 81 + 81 + 81 + 81 + 81 + 81 + 81 + 81 = 729
81 × 10 = 81 + 81 + 81 + 81 + 81 + 81 + 81 + 81 + 81 + 81 = 810
A factory produces 81 gadgets every hour. How many gadgets will it produce in 12 hours?
Answer: 81 × 12 = 972 gadgets
A runner covers 81 kilometers in one week. How far will they run in 9 weeks?
Answer: 81 × 9 = 729 kilometers
A school has 81 desks in each classroom. How many desks are there in 15 classrooms?
Answer: 81 × 15 = 1215 desks
A bookstore receives 81 new books every week. How many books will it receive in 14 weeks?
Answer: 81 × 14 = 1134 books
A company hires 81 employees per department. How many employees are there in 20 departments?
Answer: 81 × 20 = 1620 employees
1. Find the value of 81 times 20 using the table of 81.
The value of 81 times 20 is:
81 × 20 = 1620
2. How many times should we multiply 81 to get 729?
From the table of 81:
81 × 9 = 729
Therefore, 81 has to be multiplied by 9 times to get 729.
3. What is 81 times 12 minus 9 plus 7?
From the table of 81:
81 × 12 = 972
So, 972 − 9 + 7 = 970
Therefore, the answer is 970.
4. Using the table of 81, find the value of 6 plus 81 times 9 minus 81 times 14.
From the table of 81:
81 × 9 = 729 and 81 × 14 = 1134
So, 6 + 729 − 1134 = −399
Therefore, the answer is −399.