39:3*4 64:2*3 48:4*8 100-3*4 6*9+48:6 66:3*2-5 84-(48+26) 23+(75-48) 53-(53-40)

а) 39 : 3 * 4 = 13 * 4 = 52 ;б) 64 : 2 * 3 = 32 * 3 = 96 ;в) 48 : 4 * 8 = 12 * 8 = 96 ;г) 100 - 3 * 4 = 100 - 12 = 88 ;д) 6 * 9 + 48 : 6 = 54 + 8 = 62 ;е) 66 : 3 * 2 - 5 = 22 * 2 - 5 = 44 - 5 = 39 ;ё) 84 - ( 48 + 26 ) = 84 - 74 = 10 ;ж) 23 + ( 75 - 48 ) = 23 + 27 = 50 ;з) 53 - ( 53 - 40 ) = 53 - 13 = 40 .