Вправи 301 - 400 » 357-358

357. Винесіть за дужки 2–5. 1) 2–6 + 27 = 2–5 • 2–1 + 2–5 • 212 = 2–5(2–1 + 212); 2) 2 – 2–5 + 210 = 2–5 • 26 – 2–5 + 2–5 • 215 = 2–5(26 – 1 + 215); 3) 2–3 + 23 – 2–15 + 215 = 2–5 • 22 + 2–5 • 28 – 2–5 • 2–10 + 2–5 • 220 = 2–5 • (22 + 28 – 2–10 + 220). 358. Винесіть за дужки 3–4. 1) 3–12 + 312 = 3–4 • 3–8 + 3–4 • 316 = 3–4(3–8 + 316); 2) 3 • 3–4 + 34 = 3–4 • 35 + 3–4 + 3–4 • 38 = 3–4(35 + 1 + 38); 3) 3–5 + 35 – 3–1 + 3 = 3–4 • 3–1 + 3–4 • 39 – 3–4 • 33 + 3–4 • 35 = 3–4(3–1 + 39 – 33 + 35).