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# Details for problem "Number wall sums of whole numbers"

Quickname: 8704

Elementary School, Primary School, Junior High School, Middle School.

## Summary

In the number wall missing sums have to be added.

## Description

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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## Customization options for this problem

Parameter
Possible values
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

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Description
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Fill in the blank boxes in the pyramid of units of measurement.