. A box has 4 books, each 25 mm thick and 5 paper sheets each 0.032 mm thick. Then the
total thickness of the box is ........................
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Thickness of one book. 25mm
Number of books. 4
Total thickness of pile. 25 × 4
100mm
Thickness of one sheet. 0.032mm
Total number of sheets. 5
Total thickness of pile. 0.032× 5
0.16mm
Thickness of books. 100mm
Thickness of papers. 0.16mm
Total thickness. 100.16mm
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