Hi guys,Can someone explain me how to explain how to get from fourfifths to tenths?Many thanks?
404472
from 4/5 to /10?\nYou multiply both by 2.\n4 x 2 and 5 x 2 \nSo u get 8/10
97729
divide by ten!\n5mm is 0.5cm so all u need to do is divide the 5 by ten so u get 0.5cm :)
918039
get a calculator with fraction symbol.\n\n\nfigure out the pattern.\n2/4 = 1/2\n3/6 = 1/2\n4/10 = 2/5
1127163
you line up the decimal points and subtract from right to left.\nExample:\n\n  2.10\n- 1.25\n_____\n   .85
888394
Every time that we move the decimal point to the left, we are dividing a number by 10. we can make up for this by decreasing the power of the exponent by 1.\n\nEvery time that we move the decimal point to the right, we are multiplying a number by 10. we can make up for this by increasing the power of the exponent.\n\n\n.0035 x 10^15 = 3.5 x 10^12\n.002 x 10^17 = 2 x 10^14\n\n7000 x 10^33 = 7 x 10^36\n\nWhen multiplying two scientific notation numbers, like\n\n(a x 10^b) * (c x 10^d)\n\nmultiply a and c, and add b and d. Use the sum as the exponent of the product.\n\nSo:\n\n(3.5 x 10^12) * (2 x 10^14) = 7 x 10^26\n\nNow we can divide.\n\nWhen dividing two scientific notation numbers, like\n\n(a x 10^b) / (c x 10^d)\n\ndivide a by  c, and subtract d from b. Use the difference as the exponent of the product.\n\nSo:\n\n(7 x 10^26) / (7 x 10^36) = 1 x 10^(-10)
827675
Dear Fifth Graders,\n\nI know you might find working with decimals kind of hard, and that dividing one decimal number by a second decimal number must be even harder. But, actually, it is quite easy if yo first convert the decimals to whole numbers.\n\nRule 1: To convert a decimal to a whole number, move the decimal point to the riight until you have a whole number. \n\nFor example: \n2.75 = 275 by moving the decimal point 2 places to the right.\n0.006 = 6 by moving the decimal point 3 places to the right.\n\nRule 2: When you divide one decimal number into another decimal number, you MUST move the decimal point the same number of places for both numbers.\n\nFor example, if you are dividing 2.75 by 0.006, you must move the decimal point 3 places in both numbers so the new problem becomes 2750 divided by 6. So you have changed the division of decimal numbers to division of whole numbers. This is a lot easier, don't you think?\n\nHere's another example: \nDivide .05 by .0001\nHere we have to move the decimal point 4 places to th right.\nThis gives 500 divided by 1 which is just 500. Easy, eh?\n\nRemember that if you have to move the decimal point mor places than there appears to be room for, simply add zerooes to get the necessary number of places. In the example above,\n.05 and .050, and .0500, and .0500000000 are all  the same number. So to move the decimal point 4 places to the right \nfor the number .05, we simply add 2 zeroes making it .0500 and now we can move the decimal point 4 places changing .05 to 500. \n\nHope this helps you to understand decimals better \n\nGood Luck
478724
0.7 * 10^2 or 0.7 E+2 in some calculators,\n\nmeans that you must take your decimal (0.7 in this case) and shift the point a number of times as the exponent says (in this case 2) to the right if it is positive (like in this case) and to the left if it's negative.\n\nIn this case you must move the point two steps right: \nfrom 0.7 to 7.0 (first step) and then to 70. (final answer)\n\nAnother couple of exemples:\n\n.35 E-6 (or 0.35 * 10^-6)\nyou must move the point six steps left:\n0.00000035\n\n0.445 E+10 (or 0.445 * 10^10) \nyou must move the point 10 steps right:\n4450000000.
938398
You look at the number in the hundredths place.  If it is 5 or more then you round the tenths place one higher.
839653
.02 this has been rounded to the nearest hundredth\n.0- tenth\n.02- hundredth\n.0224- thousandths\n.02244- ten- thousandths
803861
Going from percent to fraction is easy.  Percent literally means "per 100" so just divide your percent by 100 to get a fraction.  For example, 16% = 16/100.  You can then simplify if you want, to get 16/100= 4/25.\n\n~ ~ ~ ~ \n\n66 2/3% = 0.66666.... or 0.6 (with a dash on top of the 6).  The fraction is 2/3.\n\nTo go from a repeating decimal to a fraction, it's a little tricky. Here's how you do it:  Notice how many numbers are in the repeating pattern -- in this case it's only the 6, so we have 1 repeating number.  Use this "1" to tell you that you need to multiply your decimal by 10^1 to solve.  (If our repeating decimal was 0.181818... that would be two repeating numbers and we'd need to use 10^2 to solve.)  Anyhoo, we have 1 repeating number, so take your decimal, call it x and take 10^1 times x minus x to solve:\n\n10x - x = 6.666... - 0.6666\n9x = 6\nx = 6/9 = 2/3\n\nAnd that's how you go from repeating decimals to a fraction!\n\n~ ~ ~ ~ \n\n18/15 = 120% = 1.20\n\n~ ♥ ~
795983
10 to the 4th power is 4 zeroes after 1 that is 10000.Therefore 3.6X10 the fourth power is 3.6 X 10000.And you know,how easy it is to multiply a number by 10,100 ,1000 or 10000 .just shift the decimal by number of places to the right side as many zero/zeroes are there in the multipler[and if there are not sufficient digits in the multiplicand add required number ot zero/zeroesto the multiplicand  to enable you to shift the decimal.So 3.6x 10000=36000.Now,the second problem d=9.4X10 to the fourth power=9.4 X 10000=94000 km
235677
easiest way is to just write the decimals as whole numbers and keep track of the number of places you had to move the decimal point.\n\nexample:\n\n1.23 / 4.5\n\nnumerator: move the decimal to the right twice.\ndenominator: move the decimal to the right once.\n\nthen you get 123/45.  do division as normal and you get 2.7333.\n\nnow you have to move the decimal again, but this time to the LEFT, based on the DIFFERENCE between the # of times you moved the numerator's point and the # of times you moved the denominator's.\n\nin our example:  difference = (2 - 1) = 1\n\nso the final answer is 0.27333\n\n(keep in mind that if the difference turns out to be a negative number, then you have to move the decimal in the result to the right, not the left!)
316383
Reduce it untill the # on the bottom is prime.\n (divide the top AND bottom by 2 untill you get a decimal.)
306730
well we know the 3 space must be even, in order to avoid the last space resulting in another 5\n\nhmmm... i'l work on it, provided you're working as well!\n\n..and #3 mustn't be 0, to avoid another 0\n..lol i'd have had it if i had been home...i made a program to do it, and then left before i finished/ran it lol\n\nbut that, is of course, the correct asnwer, 396*45=17820\n\nhaha thanx for the challenge!
1045837
Remember that percent means "per 100." \n\n4/10 = 0.4\nMultiplying 0.4 times 100 gives you 40%.
789559
Ten numbers per line, add 'em up and divide by 10.\n\nYou should get these means for the four sets:\n\n0.138, 0.172, 0.184, 0.156\n\nBe careful, since not all the numbers may show up on Yahoo unless you put your mouse pointer on the line.
139672
Change 1/2 to a decimal and add it to 11.\n\nChange 1/5 to a decimal and add it to 2.\n\nSubtract the second decimal number from the first.