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Today's BBC headline: Who, what, why: Why does the sum 7x8 catch people out?

(11 Posts)
ephpa95 Thu 03-Jul-14 18:17:24

My kids will tell you at once, because my genius godmother who was a teacher taught the following rhyme which I have taught them: 7 x 8 is 56. 5,6,7,8. Say it loud, over and over again. Easy!!!

Meglet Thu 03-Jul-14 18:24:44

7 x table was always my favourite.

TheFirstOfHerName Thu 03-Jul-14 21:56:48

My kids would tell you that it's not a sum. grin

sleepyhead Thu 03-Jul-14 22:22:56

I found learning the 1-6 times tables fairly easy (eventually). I think by 7 I'd kind of run out of steam re: rote learning so....

1x7 - 6x7 are fine because they're in tables I know.
7x7 is a square so that's fine.
9x7 is fine - 9x table's a cinch.
Ditto 10x7

Same goes with the 8x table. 1-6 fine, 8x8 a square, 9 & 10 fine.

Which leaves evil 7x8 (or 8x7) grin

And I know it's 56 but it's taken more than 30 years to fix it in my brain.

HPparent Fri 04-Jul-14 09:47:16

I always thought 7 x 6 = 42 more difficult to be honest. I forced my kids to say that one out loud! For 7 x 8 I subtract 8 from 64 (8 x 8) if I am unsure.

UnrelatedToElephants Fri 04-Jul-14 12:15:22

Handy memory rhymes.

8 x 8 = 64 (I ate and I ate till I was sick on the floor).
Then -8 = 56.

WowOoo Fri 04-Jul-14 12:22:08

My mum told me the 5,6,7,8 56=7x8 trick too.
So, I've never forgotten it.

The only reason I'm OK with tables at the moment is that I've been practising with my son. He tests me as often as I test him.

roguedad Fri 04-Jul-14 20:13:18

I thought this one was best managed by thinking of seven eights as ten eights (80) minus three eights (24), though I quite like the sick on the floor memory aid.

MiaowTheCat Mon 07-Jul-14 12:47:37

I got told the 5 6 7 8 trick by a bunch of year 5 kids!

marymoocow Wed 09-Jul-14 09:13:28

I walked, I walked, I picked up sticks. Seven times Eight is Fifty-Six.
Rhyme to go with 8 x 8 being sick on the floor :-)

ProudAS Thu 10-Jul-14 22:20:18

Sorry to be pedantic but it's a product not a sum. A sum has to contain a + sign.

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