List

Place value, integers, ordering and rounding

This is part of our Secondary Curriculum collection of favourite rich tasks arranged by topic.

Scroll down to see the complete collection, or explore our subcollections on Perimeter and Area in two dimensions, and Surface Area and Volume in three dimensions.

More Less is More
problem
Favourite

More less is more

Age
7 to 14
Challenge level
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In each of these games, you will need a little bit of luck, and your knowledge of place value to develop a winning strategy.
Dicey Operations
game
Favourite

Dicey operations

Who said that adding and subtracting couldn't be fun?

Nice or Nasty
problem
Favourite

Nice or nasty

Age
7 to 14
Challenge level
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There are nasty versions of this dice game but we'll start with the nice ones...
Subtraction Surprise
problem
Favourite

Subtraction surprise

Age
7 to 14
Challenge level
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Try out some calculations. Are you surprised by the results?
Number Lines in Disguise
problem
Favourite

Number lines in disguise

Age
7 to 14
Challenge level
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Some of the numbers have fallen off Becky's number line. Can you figure out what they were?
Forwards Add Backwards
problem
Favourite

Forwards add backwards

Age
11 to 14
Challenge level
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What happens when you add a three digit number to its reverse?
Place your orders
problem
Favourite

Place your orders

Age
11 to 14
Challenge level
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Can you rank these sets of quantities in order, from smallest to largest? Can you provide convincing evidence for your rankings?
Add to 200
problem
Favourite

Add to 200

Age
11 to 14
Challenge level
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By selecting digits for an addition grid, what targets can you make?
Legs Eleven
problem
Favourite

Legs eleven

Age
11 to 14
Challenge level
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Take any four digit number. Move the first digit to the end and move the rest along. Now add your two numbers. Did you get a multiple of 11?
Farey Sequences
problem
Favourite

Farey sequences

Age
11 to 14
Challenge level
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There are lots of ideas to explore in these sequences of ordered fractions.
How Many Miles To Go?
problem
Favourite

How many miles to go?

Age
11 to 14
Challenge level
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How many more miles must the car travel before the numbers on the milometer and the trip meter contain the same digits in the same order?
Difference Sudoku
problem
Favourite

Difference Sudoku

Age
14 to 16
Challenge level
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Use the differences to find the solution to this Sudoku.



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Place Value STEM footer
 

You may also be interested in this collection of activities from the STEM Learning website, that complement the NRICH activities above.