Номер 1274

1) 16 • (–1 3/8 + 2 1/16 – 3 1/2) = 16 • (–11/8) + 16 • 7/2 = –22 + 33 – 56 = – 45

2) (–5/12 + 3/7 + 1) • (–8,4) = (–5/12 + 3/7 + 1) • (–8 4/10) = (–5/12 + 3/7 + 1) • (–8 2/5) = (–5/12 + 3/7 + 1) • (–42/5) = (–5/12) • (–42/5) + 3/7 • (–42/5) + 1 • (–42/5) = 7/2 + (–18/5) – 42/5 = – 85/10 = –8,5 

3) –6 • 2 1/3 + 3 1/2 • (–6) = –6 • (2 1/3 + 3 1/2) = –6 • 5 5/6 = –6 • 35/6 = –35

4) 11 • (–3 1/7) + 2 1/7 • 11 + 11 = 11 • (–3 1/7 + 2 1/7 + 1) = 11 • (–1 + 1) = 11 • 0 = 0