There are 1000g in 1 kg… and 1000m in 1 km.

So to go from km to m you need to multiply the number by 1000. 104km = 104,000 m

For 5, you need to divide the number by 1000 to get to kg. 198g = .198kg

Another good method when you are learning this stuff is to move decimals. To work with this method, I find it’s best to write out: K H D U D C M out and put your finger on what you have and look at how many decimal places you need to move to get what you want. K is for kilo, H for hecto, D for deca, U for base unit (grams, meters, liters), D for deci, C for centi, and M for milli. So if you 4g and want to know how many mg you have, you write out K H D . D C M and put your finger (or pencil) on the dot and to get to the M (for mg) you need to move your finger to the right 3 times. So you move the decimal to the right 3 times. You add zeros as place holders if there are no numbers next to where you are moving the decimal. 4. becomes 4000. See how I added the zeros since there was nothing after the 4? To remember the order of the letters, use the phrase “King Henry Doesn’t Usually Drink Chocolate Milk”.

4) 104 km = ____ m.

K H D U D C M

where do you put your finger? Where are you trying to move to?

You put your finger on the K (km) and are moving to the U (m, not mm so not on the M). You need to move your finger to the right 3 times so you move the decimal to the right 3 times, adding zeros after each move.

104 km = 104,000 m

5) 198 g = ____ kg

K H D U D C M where does your finger go? where are you moving to?

Your finger goes on the U and you move it to the left 3, adding zeros as place holders as necessary .

198 g = .198 kg

In this problem, you don’t need zeroes.

To go from 100 km to ___m – follow the same procedure as you used for the first ones – but there is one additional step.

1km=1000m. Now multiply the 1000m by 100 because you are converting 100km.

Now do it using 104km. It’s the same process – don’t be put off because it isn’t an even number. It works the same way.

Same with number five, only you are going the other way, and there will be a decimal in your answer.

104 km = 104 x 1,000 = 104,000 m

5) 1 kg = 1,000 g

1 g = 0. 001 kg

198 g = 0.198 kg