1. **Stating the problem:** Arrange the given numbers in ascending order. 2. **Numbers given:** 25,235,678; 25,532,678; 25,235,768; 25,253,678; 25,253,768. 3. **Understanding ascending order:** Ascending order means arranging numbers from the smallest to the largest. 4. **Compare the numbers digit by digit:** - Compare the millions place: all start with 25 million. - Compare the hundred-thousands place: - 25,235,678 and 25,235,768 have 235. - 25,253,678 and 25,253,768 have 253. - 25,532,678 has 532. 5. **Order by hundred-thousands place:** 235 < 253 < 532. 6. **Compare numbers with the same hundred-thousands:** - Between 25,235,678 and 25,235,768, compare the thousands place: - 678 < 768. - Between 25,253,678 and 25,253,768, compare the thousands place: - 678 < 768. 7. **Final ascending order:** $$25,235,678 < 25,235,768 < 25,253,678 < 25,253,768 < 25,532,678$$ **Answer:** 25,235,678, 25,235,768, 25,253,678, 25,253,768, 25,532,678