In science we are doing the Metric System and my teacher put done that if you move the decimal place to the right the value lowers. and if you move it to the left it rises. Is that true i always thought it was the other way around

Answer 1

You probably misunderstood what the teacher was saying. You are correct that moving the decimal point to the right increases the value and moving the decimal point to the left decreases the value. For example,
if I start with 12.34 and I move the decimal point to 1234, of course the number is larger. Perhaps your teacher was talking about units moving; for example,
if we write the metric system something like this
km
hm
dkm
meter
dm
cm
mm
If we change 10 meters to cm, we move the decimal point to the right and the UNIT decreases to a lower value (but the value of the number becomes larger). If we have 10 mm and we change it to cm, we move the decimal point to the left and the UNIT increases to cm (but the value of the number becomes smaller). If this doesn't clear things up, ask your teacher to please take a few minutes and explain that part of the metric system to you again. Or perhaps you could talk to your teacher during office hours.

Answer 2

Just to make sure im right look at this and tell me if it is correct.

69.5 meters = 698 centimeters
152.97 milli. = .15297 liters
42.67 liters = 42670 milli.
0.00297456 kilo. = 2974560 nanograms

Answer 3

69.5 m = 6950 cm
second is ok.
third is ok.
The last one is not correct.
You move the decimal 3 places to go from kilograms to grams, then nine more places to go to ng.
I want to discourage you from omitting part of the name. For example you should write 152.97 millimeters OR 152.97 mm = 0.15297 (I like to put the 0 in front of the decimal.)