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More Upper Primary Number Facts Activities

I'm Eight
problem
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I'm Eight

Age
5 to 11
Challenge level
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Find a great variety of ways of asking questions which make 8.
Sealed Solution
problem
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Sealed Solution

Age
7 to 11
Challenge level
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Ten cards are put into five envelopes so that there are two cards in each envelope. The sum of the numbers inside it is written on each envelope. What numbers could be inside the envelopes?
Three Dice
problem
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Three Dice

Age
7 to 11
Challenge level
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Investigate the sum of the numbers on the top and bottom faces of a line of three dice. What do you notice?
Number match
problem
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Number match

Age
5 to 11
Challenge level
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A task which depends on members of the group noticing the needs of others and responding.
Spiralling Decimals
game
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Spiralling Decimals

Take turns to place a decimal number on the spiral. Can you get three consecutive numbers?

Forgot the Numbers
problem
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Forgot the Numbers

Age
7 to 11
Challenge level
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On my calculator I divided one whole number by another whole number and got the answer 3.125. If the numbers are both under 50, what are they?

Reach 100
problem
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Reach 100

Age
7 to 11
Challenge level
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Choose four different digits from 1-9 and put one in each box so that the resulting four two-digit numbers add to a total of 100.

Consecutive Numbers
problem
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Consecutive Numbers

Age
7 to 14
Challenge level
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An investigation involving adding and subtracting sets of consecutive numbers. Lots to find out, lots to explore.