19/20 + 2/5 = 19/20 + 8/20 = 17/20
15/25
you add five over 8 plus 4
18 5+18=23
In order to find the mean of numbers, add up all of the numbers and thn divide it by the number of numbers there are. Adding two, five and twelve equals nineteen. Then divide three into nineteen, and this gives you a mean of 6.33.
15% + 25% = 40%
If you add the number 5, 5 times, it is 5+5+5+5+5, which happens to equal 25
2
1 7/12 (one and seven-twelfths)
You can add 10 four times, or five eight times, or even two twenty times.
31.
To write three hundred twenty-five thousand, you would start by writing the numerical digits for each place value: 3, 2, 5, and then add the corresponding words for each place value. In this case, it would be "three hundred twenty-five thousand." Make sure to include hyphens between the words "twenty" and "five" to properly represent the number.
Same as today, but more than this- can add the extinct species of last twenty five centuries