Вправи 601 - 750 » 680-681

680. а) (32 + 3 • 2)2 = (32 + 6)2 = 382 = 1444; б) (53 – 240 : 48)2 = (53 – 5)2 = 482 = 2304; в) (76 – 340 : 68)2 = (76 – 5)2 = 712 = 5041. 681. а) 53 + 2 • 33 = 53 + 2 • 27 = 53 + 54 = 107; б) (42 – 5 • 8)3 = (42 – 40)3 = 23 = 8; в) (33 – 207 : 9)3 = (27 – 23)3 = 43 = 64.