# metric unit homework help?

im not really understanding it too much so i think..so i am home alone right now cuz my dad and mom went to dinner and nobody can check my work so im asking you guys if you can check it for me to see if im on the right track?

1) 2,000mg = 2g 2) 5L = 5,000ml 3) 16cm = 160mm

4) I dont get 4…104 km = ____ m. 5) 198g = ___kg

can you explain the math method to get to 4 and 5?

thanks. 10 to the best!

Favorite Answer

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

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