Can someone explain why this is the answer for this problem? (Subtracting a decimal)?

Question

I know this might be silly, but this has been bugging me. I had to do this problem and it looks simple, but I'm lost for words. I might be over looking something, but I just can't seem to figure it out. In the problem I need to subtract 1 from 0.36 which = 0.64

Another way to look at it, as shown in the book is:

1-(0.36) = 0.64

How is this the answer? It doesn't make any sense to me. I know it's the answer because I checked using a calculator, but I want to know how you arrive at this answer step by step. Please help, if anyone knows how you get this answer.

Oh I forgot, I'll be taking a test soon which problems like this will be on it. We aren't allowed to use calculators, so that's why I need to know how you get this answer without the help of a calculator.

Answer 1

If you're going to subtract 1 from 0.36, the answer should be -0.64. But if you put it the other way where you're going to subtract 0.36 from 1 it should be fine and the answer would be 0.64.

Here's how it goes:

1. Also place a decimal point at 1 which should look like 1.00
2. Now,

1.00
- 0.36
______
0.64

Using the rules when subtracting a bigger number to a smaller one, borrow one from the bigger unit beside to the left, isn't it? Ok? Hope it's clear........

But if it's the other way around:

0.36
- 1.00
______
- 0.64

Answer 2

You need to learn about module first. 8-5=3 5-8=-3 7-4=3 4-7=-3 1-0.36=0.64 0.36-1=-0.64

Answer 3

The trick is to convert the whole numbers into decimals first. Thus 1 becomes 100 and we deduct 36 from that getting 64. Then we replace the decimal.

1 can be expressed as 1.00
We need to subtract 0.36

Let us multiply both terms by 100

100 - 36 = 64

We need to divide it by 100 to get back the result 0.64

It looks complicated but is really easy if you remember the principle and practise.

Answer 4

Well, here is how I do it.

1.00
-
0.36

and you get 0.64 :] so it looks like 10-6 = 4, 9-3 =6 and 1 becomes 0 therefore u get 0.64

Answer 5

the best way to find out is do it backwards...
1-.36=.64
.64+.36=1 see

or if you dont like the decimals you can get rid of them by multiplying the whole problem by 100

100(1-(.36)=.64)
100-36=64

36+64=100
make sure you don't forget to divide the 100 hundred back out of the answer on your work because 1 does not equal 100

Answer 6

Seek, you've got two different statements here:

1. Subtracting 1 from .36 is: .36-1= -.64
2. Subtracting .36 from 1 is: 1-.36 = .64

So it's not "another way of.." It's two different ways.

Answer 7

Write 1 as 1.00, so the problem becomes:

1.00
0.36 -


It`s the same calculation as 100 - 36.

Hope this helps, Twiggy.

Answer 8

because of the fact the subtrahend(4.4567) is larger than the minuend(3.7689) then do the different... subtrahend - minuend = distinction... purely upload a unfavourable sign... what u did advance into purely subtract 4.4567 from 3.7689 that's any incorrect way around and additionally incorrect.. =)

Answer 9

remember 1 can be written as 1.00 and so you can make the substraction in the manual way:

1.00
-0.36
-----------
0.64

Answer 10

100 - 64 = 36
10 - 6.4 = 3.6
1 - 0.64 = 0.36

See a pattern?

Hope this helps.
.