Land division calculation

The king divided part of his lands between his three sons. To the first, he gave one-fifth. To the second, he gave 40 ha less than the first, and to the third, he gave 30% of the whole. Write down what part of the land was left to the king.
Calculation using variables.

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arithmetic

subtraction

numbers

fractions

Units of physical quantities

area

Grade of the word problem

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