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Number bonds homework help please

(13 Posts)
Saxy Sun 21-Sep-08 13:54:07

DS homework is "write the number bonds of 100" does that mean 10, 20 , 30 , 40 etc?

Sorry, being thick but want to make sure I have understood the question.

FAQ Sun 21-Sep-08 13:55:19

number bonds (from what I@ve gathered) is numbers that you add to get to get to 100 - DS1 has only really done up to 20 so far so it's

o+20
1+19
2+18
3+17 etc etc

Saxy Sun 21-Sep-08 13:59:54

Hi FAQ

I thought that but it doesn't say "number bonds to 100" it says number bonds of 100" That's why I am a bit confused.

robinpud Sun 21-Sep-08 14:01:37

what year- if it's year 3 then they need to know 20+80= 30+70= etc ie multiples of 10.

Saxy Sun 21-Sep-08 14:05:01

Hi Robinpud, yes year 3. So it should be multiples of 10? 10 + 90 = 100 etc?

robinpud Sun 21-Sep-08 14:06:51

THat's what I would do. I can't see any value in writing 81+9 etc. Number bonds are something they should have quick recall of .
Definitely multplies of 10 only. don't forget 0!

Saxy Sun 21-Sep-08 14:10:08

I would have forgotten 0, thanks! I will see if this jogs his memory - obviously was not listening when he was told about his homework! Thanks for the quick replies!

E x

infin Sun 21-Sep-08 14:25:42

For Year 3, I would also add 95+5, 85+15 and so on unless he finds the multiples of 10 bonds hard to remember. Multiples of 10 bonds are usually covered in Y2 or even Y1 as soon as children are secure in bonds to 10.

pudding25 Sun 21-Sep-08 21:43:22

Number bonds to 10
0+10=10
1+9=10
2+8=10
3+7=10
4+6=10
5+5=10

10+0=10 etc

Number bonds to 100

0+100=100
10+90=100
20+80=100
30+70=100
40+60=100
50+50=100

100+0=100 etc

CryingMyselfToSleep Sun 21-Sep-08 21:46:29

I hate number bonds.....

My Yr3 is actually doing
99+1
98+1
97+1
etc. as said previously they did
10+90
20+80 etc. late Yr1/early Yr2.

If this is his first introduction to number bonds to 100, then it should only be the multiples of 10.

pudding25 Sun 21-Sep-08 22:06:58

CMTS to you mean 98+2, 97+3? That would also be correct for no bonds to 100.

CryingMyselfToSleep Sun 21-Sep-08 22:29:10

Yes I do...it is my Bucks fizz that means 98+1 and 97 + 1 blush

Saxy Mon 22-Sep-08 09:24:09

Hi all

He has done the multiples of 10 already so I think it may be the 99+1 etc but I can't see the value of writing these all out! I have asked him to check with his teacher today. Thanks for the replies.
E x

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