It's best to convert those numbers from scientific notation to normal notation; that makes it easy to add them. After adding them, you can convert back to scientific notation if you want.
Another option is to keep the numbers in scientific notation, but to convert them so that both have the same exponent.
"Second power" means that you multiply something with itself. In this case, (10 + 15) (10 + 15).
The answer to 1.5 times 10 to the power of 16 is 15,000,000,000,000,000 (15 quadrillion).
s = 20
10 + 15 + 20 = 45
5 to the power of 2 plus 15 to the power of 2 = 250
It is: 1.3*10^15 = 1,300,000,000,000,000
"Second power" means that you multiply something with itself. In this case, (10 + 15) (10 + 15).
The answer to 1.5 times 10 to the power of 16 is 15,000,000,000,000,000 (15 quadrillion).
102 + 15 => 100+15 => 115 ans
It depends where you want the parentheses: 15 + (26 x 10) = 275 (15 + 26) x 10 = 410
s = 20
4*7*5+7^2-3*0+15 = 140+49-0+15 = 204
15 + 15 + (10 * (1 / 2)) + (10 * (1 / 2)) = 40
245
10 + 15 + 20 = 45
5 to the power of 2 plus 15 to the power of 2 = 250
42