Get a ruler in your hands. Measure things until you start to understand how a ruler works. Measure some stuff and figure out where the center is. Say you measure a book and it's 7/8" thick. You look at your ruler and see that every eighth is divided into two sixteenths, so obviously half of 7/8" is going to be 7/16". If you write that out you have 1/2 x 7/8 = 7/16. And you notice that 1/2 is divided into 2/4 and then into 4/8 and so on, so you can convert anything to anything by multiplying all the numbers on top and then all the numbers on bottom.
Other rulers are divided into 10 and 100 parts. But an inch is still and inch, so anything on one ruler can be translated to the other ruler. A half inch on one ruler is 5/10 or 50/100 on the other. An eighth inch is just 12.5 marks when you have 100 marks per inch. A metric ruler divides an inch into 25.4 parts, so a half inch would be 12.7 of those parts. Pretty simple, isn't it? Practice this a bit and people will think you went to wizard school.
0.02 is the same as 1/50 and 50÷(1/50) is the same as 50 x 50 which is 2500. It gets to where you do this stuff in your head because it's easier than writing it out.
Move the decimal. Turn .02 into .2 and since you did that to one side of the problem you have to do it to the other, so turn 50 into 500. Then it reads 500\ .2. Then if you do that again and turn .2 into 2 and 500 into 5000, your question would be 5000/2. Which is a lot easier to answer.
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Get a ruler in your hands. Measure things until you start to understand how a ruler works. Measure some stuff and figure out where the center is. Say you measure a book and it's 7/8" thick. You look at your ruler and see that every eighth is divided into two sixteenths, so obviously half of 7/8" is going to be 7/16". If you write that out you have 1/2 x 7/8 = 7/16. And you notice that 1/2 is divided into 2/4 and then into 4/8 and so on, so you can convert anything to anything by multiplying all the numbers on top and then all the numbers on bottom.
Other rulers are divided into 10 and 100 parts. But an inch is still and inch, so anything on one ruler can be translated to the other ruler. A half inch on one ruler is 5/10 or 50/100 on the other. An eighth inch is just 12.5 marks when you have 100 marks per inch. A metric ruler divides an inch into 25.4 parts, so a half inch would be 12.7 of those parts. Pretty simple, isn't it? Practice this a bit and people will think you went to wizard school.
0.02 is the same as 1/50 and 50÷(1/50) is the same as 50 x 50 which is 2500. It gets to where you do this stuff in your head because it's easier than writing it out.
Move the decimal. Turn .02 into .2 and since you did that to one side of the problem you have to do it to the other, so turn 50 into 500. Then it reads 500\ .2. Then if you do that again and turn .2 into 2 and 500 into 5000, your question would be 5000/2. Which is a lot easier to answer.
50/0.02 = 500/0.2 ( multiply both by 10)
= 5000/2 (multiply both by 10 again)
= 2500