#1
..

4 years ago
#2
Since 6.2 - 7.2 = -1, -1 * 3.4 = -3.4,, so the answer to a plus -3.4 is the answer and that is how you would use a. Or at least I think it is.

Posted from TSR Mobile
0
4 years ago
#3
0
4 years ago
#4
7.2 x 3.4
6.2 x 3.4

I take it you can see that the only difference is between the 6 and 7.

So the constant is 3.4 (or the number which is the same is 3.4) therefore if you take away 3.4 from you first answer then you'll get the second.

To explain it another way
7 x 3 = 21
6 x 3 = 18
21-3= 18
1
4 years ago
#5
(Original post by Sam00)
Thanks, you explained it well, I always overcomplicate things, I can see it's really simple now.
I'm glad I helped, I often do the same
0
3 years ago
#6
just me but i think the easyest way would be get rid of the decimals first by multiplying both numbers by 10
6.2 x 10 = 62___________3.4 x 10 = 34
then multiply them together
62 x 34 = 2108
then move the decimal point back again both times by
2108/10 = 210.8 and again 210.8/10 - 21.08
or simply 2108/100 = 21.08
0
X

new posts
Latest
My Feed

### Oops, nobody has postedin the last few hours.

Why not re-start the conversation?

see more

### See more of what you like onThe Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

### University open days

• Cranfield University
Cranfield Forensic MSc Programme Open Day Postgraduate
Thu, 25 Apr '19
• University of the Arts London
Open day: MA Footwear and MA Fashion Artefact Postgraduate
Thu, 25 Apr '19
• Cardiff Metropolitan University
Sat, 27 Apr '19

### Poll

Join the discussion

#### Have you registered to vote?

Yes! (377)
37.48%
No - but I will (76)
7.55%
No - I don't want to (71)
7.06%
No - I can't vote (<18, not in UK, etc) (482)
47.91%