1 year ago
Last edited at 9:06PM on 11/8/2012
add or subtract as many zeroes. when you multiply you add the zeroes, when you divide you subtract the zeroes. 50x30= multiply the first numbers in the tens place and add the zeroes, 1500 is the answer. 20/60 cross of the zeroes and divide the tens place, answer is 3. Hope this helps :) if you're working with numbers in the hundreds place, it is the same thing 500x300= 5x3 then add zeroes 150000, then comas after every three numbers working backwards, so its 150,000.
I remember learning this in algebra 1... Whenever you're dividing powers you subtract them and if the exponent is negative you make the answer a fraction by putting the positive exponents on top and negative below