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In the number wall missing sums have to be added.
This is a classic number wall problem, where positive natural numbers are summed up ascending through the wall.
The number for each brick is formed by adding the numbers in the brick left below and right below the brick. Some bricks are left blank - these have to be filled in with the correct number. Depending on whether both values below an empty box are given, this may be an addition or a subtraction problem.
The number range for the numbers occuring in the number wall can be specified. The wall height is selectable.
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|Number of problems||1, 2, 3, 4, 5, 6, 7, 8, 9, 10|
|Number range||20, 30, 40, 50, 100, 200, 500, 1000, 10000, 100000|
|Height of wall||three, four|
|Remark||Description||Name and direct link|
|variant with numbers with decimals||In a number wall, blanks have to be filled in with decimal numbers.||Number wall sums of decimal numbers|
|variant with numbers from the times tables||In a number wall, products from the times tables 1-10 are to be filled in.||Number wall times table products|
|similar, but with units of measurement||Fill in the blank boxes in the pyradmid of units of measurement.||Number wall with physical quantities|