Math Is Fun Forum / Mandy Jane's Corner

mandy jane · 2013-03-20 02:32:17

hi steveb mandy here. i have done some of the dividion you gave me but still find it hard to do? 9 divided by 7479 is

0 7 7
__________
9 |7 4 7 9
|0
----
7 4
6 7
-----
7 7
6 7
------
1 0 9

SteveB · 2013-03-20 02:35:21

Right. You have made a mistake: You see that "67" under the 74. That is not a multiple of 9.

I think that you thought that 9 * 7 was 67, but actually 9 * 7 = 63.

Do you want to try that bit of it again?

SteveB · 2013-03-20 02:41:15

Okay I will give you a hint: 9 * 8 = 72.

mandy jane · 2013-03-20 02:42:55

i have try it agan

0 7 1
______
|7 4 7 9
|0
----
7 4
6 3
----
1 1

am i right?

SteveB · 2013-03-20 02:45:05

I realise that I have put a * instead of an x.

I should have written 9 x 8 = 72 and 9 x 7 = 63

In computer programming the asterisk is often used instead of x

SteveB · 2013-03-20 02:46:08

The use of "63" there is wrong because the multiple is too low. Try again.

mandy jane · 2013-03-20 02:49:12

as you can see i think i need to practes my tables first? what do you think?

SteveB · 2013-03-20 02:52:16

I think I will tell you the answer to that bit of it which is that 9 x 8 = 72

So you get 74 - 72 = 2

I do agree that you do need to practice tables, but how can I help with that online ?

mandy jane · 2013-03-20 02:57:14

can you give me som quesson like 3x4= and so on do you think it will help me?

SteveB · 2013-03-20 02:58:05

Okay so we have:
0 8
---------------
9 | 7 4 7 9
0
---
74
72
---
2

What do we need to do next?

The rest of it is easier because the numbers happen to be quite low.

SteveB · 2013-03-20 02:59:33

Sorry about that you posted while I was posting ! The limitations of online chat.

Right here are some tables for you:

6 x 7 =
9 x 5 =
8 x 4 =
9 x 3 =
6 x 6 =

mandy jane · 2013-03-20 03:01:43

bring dow the 7 is that right?

SteveB · 2013-03-20 03:03:19

Yes that is correct. Do you want to finish the division off ?

mandy jane · 2013-03-20 03:05:31

6 x 7 = 35

9 x 5 = 45

8 x 4 = 32

9 x 3 = 27

6 x 6 = 36

am i right?

mandy jane · 2013-03-20 03:07:50

yes i do what to finish the divison off please?

SteveB · 2013-03-20 03:08:43

6 x 7 is not 35.

All of the rest of those tables were correct though. Well done. So do you want to try again with 6 x 7 ?

SteveB · 2013-03-20 03:12:30

0 8
---------------
9 | 7 4 7 9
0
---
74
72
---
2 7 any ideas for the next step here? I have seen that number before somewhere (????)

mandy jane · 2013-03-20 03:13:25

is 6 x 7 = 42 am i right?

Last edited by mandy jane (2013-03-20 03:14:17)

SteveB · 2013-03-20 03:14:43

No. 6 x 7 = 42.

I have thought of an idea. You could take a note of any times table that you cannot do
correctly and focus your attention on those ones perhaps.

mandy jane · 2013-03-20 03:17:13

now what should we do then?

SteveB · 2013-03-20 03:17:20

Sorry about that. Sometimes I am writing my next post and during that time you are doing yours.
When I post mine I see yours after I have submitted mine. Then I see that my post no longer makes sense.
But yes your answer in #643 was correct it is 42. This is one that you are going to have to focus on a bit more.

SteveB · 2013-03-20 03:19:06

Right how about we just finish off that division.

The situation was that we have 27 left and we need a multiple of 9 for that.

What number do you think we should choose ?

mandy jane · 2013-03-20 03:22:14

is 3 right?

SteveB · 2013-03-20 03:25:04

Yes 3 x 9 = 27.

So the "3" bit of that goes at the top (so that becomes 083 .... ).

Now the subtraction 27 - 27 = 0

So all we have now is 9 which is dropped down with an arrow.

Now we need a multiple of 9 which equals 9. Any comment ?

mandy jane · 2013-03-20 03:27:18

9 x 9 = 1 am i right? what shoul we do next then?

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