Explore our interactive balances in all their different forms in this feature - a seesaw in the woods; a number balance with hooks for identical weights; a number balance with a tray on each side and a hanging mobile.
We hope that these activities deepen your understanding of what it means when we say that two amounts are equal.
The last day for sending in solutions to the live problems is Monday 1 February.
Seesaw Shenanigans liveAge 3 to 7
Challenge Level
Challenge Level
A group of animals has made a seesaw in the woods. How can you make the seesaw balance?
Equivalent Pairs liveAge 5 to 7
Challenge Level
Challenge Level
Can you match pairs of cards which show the same amount?
Number Balance liveAge 5 to 7
Challenge Level
Challenge Level
Can you hang weights in the right place to make the the number balance balanced?
Are You Well Balanced? liveAge 5 to 7
Challenge Level
Challenge Level
Can you work out how to make each side of this balance equally balanced? You can put more than one weight on a hook.
Sweetie Box liveAge 5 to 11
Challenge Level
Challenge Level
Max and Bryony both have a box of sweets. What do you know about the number of sweets they each have?
Interactive Balance Age 5 to 11
Challenge Level
Challenge Level
In this simulation of a balance, you can drag numbers and parts of number sentences on to the trays. Have a play!
True or False? liveAge 7 to 11
Challenge Level
Challenge Level
Without doing lots of calculations, can you decide which of these number sentences are true? How do you know?
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NRICH is part of the family of activities in the Millennium Mathematics Project.
NRICH is part of the family of activities in the Millennium Mathematics Project.