30 加法 20 等于多少？

30 + 20 = 50

30加法20 等于 50

竖式演算

30+2050

验算

  • 用减法验算：50 − 20 = 30
  • 用减法验算：50 − 30 = 20

相关题目

30 + 19 = 49 30 + 21 = 51 30 + 22 = 52 30 + 18 = 48 30 + 23 = 53 30 + 17 = 47 30 + 24 = 54 30 + 16 = 46 29 + 20 = 49 31 + 20 = 51 28 + 20 = 48 32 + 20 = 52 33 + 20 = 53 27 + 20 = 47 34 + 20 = 54 26 + 20 = 46 1 + 49 = 50 2 + 48 = 50 3 + 47 = 50 4 + 46 = 50 5 + 45 = 50 6 + 44 = 50 61 + 32 = 93 81 + 15 = 96 5 + 2 = 7 20 + 76 = 96 55 + 41 = 96 73 + 16 = 89 10 × 5 = 50 25 × 2 = 50