£.s.d (Pounds stirling, shillings and pence) multiplication

[Brewins girl]

Help - I'm stuck! and embarrassed to say so, as I was brought up on £sd (the money, not the drug!)

I need to multiply two amounts by 100. The first, 13s 1½d (13 shillings, one and a half pence) was easy - I made it £6. 17s. 6d - can anyone confirm that this is right (or not!) please.

Then the second has got me stumped - so, 100 x £1. 9s. 10d - I've got £186.10s.4d -can this possibly be right?

[Brewins girl]

Oh dear, I'm sure now that my first calculation was wrong - way out in fact

I think 100 x 13s 1½d is £65.12s. 6d not £6.17s.6d.

No wonder I've never made a lot of money!!!

[ShaunJ]

For the second one,  £1. 9s. 10d is 2d short of £1.50 in new money. So 100 times that is £150 minus 200d. 200d is 16/8 so the net sum is £149 3s 4d

[RJ_Paton]

I think 100 x 13s 1½d is £65.12s. 6d not £6.17s.6d.

I would agree with that figure and the second one I make to be
£149 3s 4d
(100 x £1 = £100 , 100 x 9s = £45 100x10d = £4 3s 4d)

[shawsboy]

100x £1 =  £100
100x 9s =  900s divided by 20 (shillings to the £1) =£45
100x 10d = 1000 divided by 240 (pennies in the £1) = £4.16d

total £149. 1.4d

hope this helps

12 pennies in a shilling  24 halfpennies to a shilling

[shawsboy]

£65.12s 6d is the other amount

[RJ_Paton]

100x £1 =  £100
100x 9s =  900s divided by 20 (shillings to the £1) =£45
100x 10d = 1000 divided by 240 (pennies in the £1) = £4.16d

total £149. 1.4d

1000 pennies  divided by 240 (pennies to the pound) gives £4 (£4=960 pennies) with 40d left over, 40d = 3s 4d

[Greensleeves]

I agree with £149 3s 4d - gosh, it's a long time since I've done that kind of arithmetic!   

[jaybelnz]

  . I didn't even try GS!  That little lot was too much like schooldays! 

Maths was the only reason I chose Junior Class teaching!  Sums!! Counting! Tables! etc.

 Little did I know is that I was going to be inundated with new things like, the "amazing NEW JUNIOR MATHS Curriculum" - and things like Quiseniere (spg?) Rods, Face value, place Value,  and other things I just couldn't understand, (and still don't).

3 years after introducing these new programmes into schools, including parent and teacher education,  the Ministry of Education decided that due to the nationwide high rate of failure, with both children and their teachers, it would be totally abandoned, and the old curriculum (proven as having been very successful) would be reinstated!

A whole generation of children, their parent and teachers were affected!