0
Example: 2.25 x 3.45
Omit the decimal points, though note their position:
225 (2 decimal points)
345 (2 decimal points)
----------- using long-multiplication
67500
9000
1125
-----------
77625
Add the decimal points positions together (2 + 2 = 4) count 4 places from the right and place the decimal between the two 7's, thus: 7.7625
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How do you multiply by 2 or 3 digit numbers?
first digit time second digit and second digit times first digit then repeat
If you are not allowed to repeat a digit how many 3-digit numbers can be made from the digits 1 2 3 4 and 5?
60. There are 5 different choices for the first digit, four for the second digit, and three choices for the third digit. According to the fundamental counting principle, you multiply them together to get the total number of possible ways, and 5 x 4 x 3 = 60 Another way to think about it is 5!/3!
What is the unit digit of 43 to the power of 34 factorial?
Well, isn't that a happy little math problem! When we look at the unit digit of powers of numbers, we focus on the cyclical pattern they follow. The unit digit of 3 raised to any power follows a pattern: 3, 9, 7, 1, and then repeats. So, to find the unit digit of 3 to the power of 34 factorial, we look for the remainder when 34 factorial is divided by 4, which is 2. Therefore, the unit digit of 3 to the power of 34 factorial is 9.
873 X 12?
To calculate 873 multiplied by 12, you would first multiply 3 (the units digit of 873) by 12 to get 36. Write down the 6 and carry over the 3. Then, multiply 7 (the tens digit of 873) by 12, which equals 84. Add the carried over 3 to get 87. Finally, multiply 8 (the hundreds digit of 873) by 12 to get 96. Therefore, 873 multiplied by 12 equals 10,476.
How do you multiply a three digit number by a four digit number?
You put the four digit number at the top of the three digit number and you do the same thing as you would do with a two digit number with a 3 digit number.
