The document contains a series of mathematical calculations including addition, subtraction, multiplication, and division across multiple problems. It lists specific numeric operations along with their results for each calculation type. The document appears to be an educational exercise from 2015 by a student named Diana Elzabeth Tapia Alonso under the supervision of Miriam Santisteban.

1. HECHO POR: DIANA ELZABETH TAPIA ALONSO
PROFESORA: MIRIAM SANTISTEBAN
AÑO:
2015

2. SUMAS
1. 2.571 + 2.76310 + 3.99723 + 5.78594 = 15.11727
2. 987 + 2.804 + 1.778 + 5.367 = 12.936
3. 7 + 3.1 + 0.1 + 5.4 = 11.3
4. 0.37980 + 3.85 = 4.2298
5. 6.4152 + 3.819 = 10.2342

3. 1. 5.87 – 1.33 – 2.88 = 1.66
2. 4.04 – 1.17 – 0.98 = 1.84
3. 2.48802 – 0.83 = 1.65802
4. 3.457 – 1.33587 – 1.709 = 0.41213
5. 5.26469 – 0.3276 – 3.25467 = 1.68242

4. 1. 4848 × 1965 = 9526320
2. 2473 × 8912 = 22039376
3. 1739 × 8040 = 13981560
4. 7022 × 6788 = 47665336

5. 1. 467.2 ÷ 10000 = 0.04672
2. 990.38 ÷ 10 = 99.038
3. 341.2 ÷ 10 = 34.12
4. 174.49 ÷ 100 = 1.7449
5. 589.32 ÷ 1000 = 0.58932

6. 1. 33 · 34 · 3 = 38
2. 57 : 53 = 54
3. (53)4 = 512
4. (5 · 2 · 3)4 = 304
5. (34)4 = 316