# Number Triples - Addition and Subtraction

This little number hunt activity could be used as a paired-starter, or as a game.

The focus is on finding trios of numbers which can be used to create addition and/or subtraction sentences.

For example, 4, 6, 10 are triples since they can be used as the basis for the following simple calculations:

10 = 4 + 6

10 = 6 + 4

6 = 10 - 4

4 = 10 - 6

The children work on an A5 laminated card which shows a grid of 25 numbers. The challenge is for them to use a wipe-off pen to find and mark as many triples as they can. Looking for numbers that are adjacent to each other, horizontally, vertically or diagonally.

The activity can be used as a game; children take it in turns to mark off triples (using different coloured pens), and the player who manages to find the last set of numbers is the winner.

As a follow-up, the children could write out some of the triples as number sentences, though this is not strictly necessary since most of the maths work has already been done when finding and talking about the numbers. A better follow-up would be to ask the children to design their own 'triples' board; they could even be challenged to create one which had (say) exactly 12 triples... no more, no less. Then their partner tests this out for them!

The downloadable pdf contains 6 different Triples Grids, together with instructions for using the activity as a game. As always, the numbers used are not generated at random, but specifically chosen to give enough of a challenge to the children. Here's an image of the first two:

We have a related file (from the DFES) on mathsticks/extra

We have also compiled a further set of 8 grids for our Mathstick+ members, see the Mathsticks+ buttons below.

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## Comment viewing options

### Great way to increase

Great way to increase fluency!
0 users have voted.

### Next week we are learning the

Next week we are learning the link between subs and addition. This will go in the maths corner for children to use independetly - many thanks!!
0 users have voted.
PrimaryMum

### Yay! Another opportunity for

Yay! Another opportunity for my SEN pupil to explain thought processes and patterns. He has only recently begun to notice (and comment on) the patterns he sees on the number chart, as well as the relationship between counting in 2's/doubling/2x table. Thank you!
0 users have voted.

### This is great practice to

This is great practice to work on fluency in a new and different way. Thanks!
0 users have voted.

### This looks great thanks.

This looks great thanks. Looking forward to trying it as a way to refresh the memory after the summer hols.
1 user has voted.

### Haven't been on this site for

Haven't been on this site for a while - and I wish I had been remembering to look here for ideas before looking elsewhere! Would have saved me a lot of time! Have just downloaded the triples hunt and rocket race which will be perfect to use with my primary 2s and 3s who have been working on subtraction and need to apply what they have learned to problem solving! Thank again
0 users have voted.

### karynb, Good to hear that you

karynb,

Good to hear that you are still coming back and finding new, useful maths resources here. We have been quiet for a couple of weeks/months, but are set to add more and more over the coming weeks - so watch this space!

Cheers.

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### I was thinking that this

I was thinking that this could be played with multiplication too. The children would need to hunt for factor families instead.
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### That's a great idea, thank

That's a great idea, thank you for sharing.

John

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### This  has  helped build

This  has  helped build confidence of a child  I working with  to actually think about numbers and explore how  to manipulate them.
0 users have voted.

### This is a great activity for

This is a great activity for a starter.  I will try it next week.
0 users have voted.

### Thislooks like a great

Thislooks like a great activity - regardless of ability, and I intend to use it during my weekly maths challenge sessions. I particularly like the idea of getting the chn to make their own! I can see some real extension for my HA here, especially if they haveto create a limited number of triples!
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### As a teacher I am also

As a teacher I am also tutoring a family of refugees. I'm looking forward to using this activity with my class and the family.
0 users have voted.

### Great, I've been trying to

Great, I've been trying to reinforce these relations lots with my class over the past half-term - this will be great to consolidate what we've been doing in starter activities.
1 user has voted.

### Amazing idea, so simple.

Amazing idea, so simple. Can't wait to use it with my kids. Thanks again.
0 users have voted.

### Planning to use this in my

Planning to use this in my starter this morning, hope its gonna go down well!
0 users have voted.