1) Решим каждое слагаемое по отдельности:20.517 = 20.5 (10 + 7) = 20.5 10 + 20.5 7 = 205 + 143.5 = 348.579.517 = 79.5 (10 + 7) = 79.5 10 + 79.5 7 = 795 + 556.5 = 1351.520.50.28 = 20.5 (0.2 + 0.08) = 20.5 0.2 + 20.5 0.08 = 4.1 + 1.64 = 5.7479.50.28 = 79.5 (0.2 + 0.08) = 79.5 0.2 + 79.5 0.08 = 15.9 + 6.36 = 22.26
Сложим результаты:348.5 + 1351.5 + 5.74 + 22.26 = 1727
2) Решим каждое слагаемое по отдельности:42.2² = 42.2 42.2 = 42.2 (40 + 2) = 42.2 40 + 42.2 2 = 1688 + 84.4 = 1772.442.241.2 = 42.2 (40 + 1.2) = 42.2 40 + 42.2 1.2 = 1688 + 50.64 = 1738.6457.8² = 57.8 57.8 = 57.8 (50 + 7.8) = 57.8 50 + 57.8 7.8 = 2890 + 450.84 = 3340.8457.856.8 = 57.8 (50 + 6.8) = 57.8 50 + 57.8 6.8 = 2890 + 392.24 = 3282.24
Вычтем результаты:1772.4 - 1738.64 + 3340.84 - 3282.24 = 33.76 + 58.6 = 92.36
Ответ:1) 17272) 92.36
1) Решим каждое слагаемое по отдельности:
20.517 = 20.5 (10 + 7) = 20.5 10 + 20.5 7 = 205 + 143.5 = 348.5
79.517 = 79.5 (10 + 7) = 79.5 10 + 79.5 7 = 795 + 556.5 = 1351.5
20.50.28 = 20.5 (0.2 + 0.08) = 20.5 0.2 + 20.5 0.08 = 4.1 + 1.64 = 5.74
79.50.28 = 79.5 (0.2 + 0.08) = 79.5 0.2 + 79.5 0.08 = 15.9 + 6.36 = 22.26
Сложим результаты:
348.5 + 1351.5 + 5.74 + 22.26 = 1727
2) Решим каждое слагаемое по отдельности:
42.2² = 42.2 42.2 = 42.2 (40 + 2) = 42.2 40 + 42.2 2 = 1688 + 84.4 = 1772.4
42.241.2 = 42.2 (40 + 1.2) = 42.2 40 + 42.2 1.2 = 1688 + 50.64 = 1738.64
57.8² = 57.8 57.8 = 57.8 (50 + 7.8) = 57.8 50 + 57.8 7.8 = 2890 + 450.84 = 3340.84
57.856.8 = 57.8 (50 + 6.8) = 57.8 50 + 57.8 6.8 = 2890 + 392.24 = 3282.24
Вычтем результаты:
1772.4 - 1738.64 + 3340.84 - 3282.24 = 33.76 + 58.6 = 92.36
Ответ:
1) 1727
2) 92.36