100 减法 20 等于多少?
100 - 20 = 80
100减法20 等于 80
竖式演算
验算
- 用加法验算:80 + 20 = 100
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100 - 19 = 81
100 - 21 = 79
100 - 22 = 78
100 - 18 = 82
100 - 23 = 77
100 - 17 = 83
100 - 24 = 76
100 - 16 = 84
99 - 20 = 79
98 - 20 = 78
97 - 20 = 77
96 - 20 = 76
95 - 20 = 75
94 - 20 = 74
93 - 20 = 73
92 - 20 = 72
81 - 1 = 80
82 - 2 = 80
83 - 3 = 80
84 - 4 = 80
85 - 5 = 80
86 - 6 = 80
50 - 26 = 24
72 - 68 = 4
70 - 63 = 7
62 - 36 = 26
72 - 23 = 49
90 - 61 = 29
20 + 60 = 80
57 + 23 = 80