How do you write 8.2 in expanded form?

Answer 1

If you're talking about scientific notation you would take a number, for example, 0.00000056 and move the decimal to the rightso you have a number before and after the decimal (this case 5.7) and count how many place you move the decimal in this case 7. So to write it in scientific notation it would be 5.7 X 10 and 10 would have a ngative exponent, negative because the numbe is a decimal and we moved the decimal to the right. The exponent would be the number of places you move the decimal, 7. The scientific notation of 0.00000056= 5.6 X 10 to the negative seventh (-7 exponent) power. But to put it in it's expanded or original form you would have an equation like 5.6 X 10 to the -7th power. You would write out 5.6, and because you are multiplying by 10 you just have to move the decimal the number of places the exponent is and because the exponent is negative to the left for positive exponents to the right. So you have 5.6 and it's multiplyed by 10 with a negative exponent of 7 you would take the decimal and move it to the left 7 times so you get 0.00000056. The scientific method is just a simpler way of writing out long numbers with a lot of zeros. NOTE: If you have a positive exponent you move the decimial to the left to get scientific notation and right for expanded or original form.