Please help me with this problem. 12÷1/2?

2015-12-17 2:40 am

回答 (5)

2015-12-17 2:41 am
12/ (1/2) is the same thing as 12 x 2. So the answer would be 24
2015-12-17 2:41 am
24.
2015-12-17 3:04 am
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 an 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.

12 ÷ 1/2 In English, how many times will a line 1/2" long fit into a space 12" long? Grab a ruler and count them: 24 times. In general, when you have to divide by a fraction, you invert the fraction and multiply. 12 ÷ 1/2 = 12 x 2 = 24

BTW "12 divided by 1/2" is math. "Twelve divided in half" is English and means something different. English can be very goofy, but math can not.
2015-12-17 2:51 am
1/2 is just 1 divided by 2. Meaning counting 2 half's (1/2) will equal 1 of the number being divided if divided by two. Example 2÷1 is 2 whereas 2÷1/2 will be 4.

So if the question is 12÷1 it will be 12. It will be double (shown in example in previous paragraph) for 12÷1/2. Which is 24.

If still confusing below is dividing 2...

2÷1 is 2.

If 1 is changed to 1/2 (2÷1/2) the 2 is doubled=4.


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