57 +3= 58 ×16= 17 + 18 = 910 × 13 =
512 ×6= 2- 710 = 60× 45 = 23 - 16 =
29 + 23 = 78 ﹣ 12 = 35 + 14 = 34 ﹣ 710 =
15× 25 = 37 × 73 = 29 × 34 = 48× 136 =