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Mathematics, 30.08.2021 08:40 champ1135

A math textbook has 900 pages. The teacher had covered 312 pages in the first form and 289 pages in the second form. The teacher needs to cover the entire textbook in the third form. How many pages of the textbook had the teacher covered in the first and second form altogether? And how many more pages left does the teacher need to cover in the third form?

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