To write 120 million in standard form, you would express it as 1.2 x 10^8. In standard form, a number is written as a coefficient multiplied by 10 raised to a certain power. In this case, the coefficient is 1.2 (the digits 1 and 2), and the power of 10 is 8 (representing the seven zeros in 120 million).
120
120
42,000,120
120 is an integer. Integers aren't fractions or mixed numbers. You can write 120 as 120/1 or 119 and 4/4, but it wouldn't be in simplest form. The simplest form of any integer is the integer itself.
120 + 36 = 156
120,000,000
6,402,000,120
120
Not sure what you mean by "standard form"; one way to write this is as 120 µm.
how do we write 12 tens in standard form
12 ten thousands = 120 thousand = 120,000
120
120 nanometers can be written in scientific notation as 1.2 x 10^-7 meters.
9,000,120
120,000,000 120,000,000
512
42,000,120