Номер 1280
1) 32,7 • 3 5/12 – 9 7/12 • (–32,7) + 32,7 = 32,7 (3 5/12 – 9 7/12 • (–1) + 1) = 32,7 • 14 = 457,8
2) –14,9 • 2 1/7 + 3 1/6 • (–14,9) + 5 13/42 • 13,9 = –14,9 (2 1/7 + 3 1/6) + 5 13/42 • 13,9 = –14,9 • 5 13/42 + 5 13/42 • 13,9 = 5 13/42 • (–14,9 + 13,9) = 5 13/42 • (–1) = –5 13/42