280以内加减法，链接后加“?x=300”可调整加大计算数值，最大300。点此切换答案显示，方便截图打印。
注：改变浏览窗口大小，可调整每行题数，本页默认会显示100道，刷新页面随机重排。黑海豚设计（交流QQ:6932391)
178 + 18 = 196
52 + 110 = 162
139 + 51 = 190
178 + 90 = 268
105 - 96 = 9
174 + 74 = 248
168 + 98 = 266
174 - 116 = 58
134 - 60 = 74
205 - 48 = 157
169 - 69 = 100
208 + 13 = 221
33 + 35 = 68
231 + 15 = 246
268 - 3 = 265
149 + 67 = 216
171 - 128 = 43
75 + 24 = 99
72 + 182 = 254
242 - 239 = 3
170 - 82 = 88
3 + 139 = 142
180 + 16 = 196
102 + 155 = 257
59 + 3 = 62
42 + 219 = 261
94 + 46 = 140
122 + 26 = 148
224 - 59 = 165
151 - 132 = 19
179 + 61 = 240
133 - 32 = 101
254 - 141 = 113
56 + 173 = 229
243 - 179 = 64
30 + 129 = 159
84 + 33 = 117
77 + 140 = 217
57 + 124 = 181
196 + 19 = 215
238 - 159 = 79
136 - 49 = 87
53 + 165 = 218
133 + 31 = 164
108 + 86 = 194
240 - 73 = 167
26 + 93 = 119
149 + 100 = 249
113 - 8 = 105
10 + 5 = 15
228 - 169 = 59
106 + 167 = 273
122 + 83 = 205
6 + 32 = 38
43 - 8 = 35
143 + 58 = 201
133 + 6 = 139
144 - 53 = 91
178 + 31 = 209
154 + 86 = 240
28 + 12 = 40
22 + 150 = 172
46 - 14 = 32
128 - 101 = 27
196 - 100 = 96
229 - 220 = 9
239 - 121 = 118
258 - 129 = 129
106 - 10 = 96
260 - 81 = 179
94 - 26 = 68
171 - 152 = 19
50 - 31 = 19
250 - 239 = 11
66 + 212 = 278
100 - 66 = 34
182 - 175 = 7
59 + 172 = 231
81 + 61 = 142
170 - 153 = 17
40 + 187 = 227
113 + 41 = 154
188 + 19 = 207
58 + 49 = 107
179 - 154 = 25
169 - 125 = 44
222 - 72 = 150
238 - 164 = 74
240 - 172 = 68
227 - 63 = 164
2 + 123 = 125
6 + 87 = 93
44 + 111 = 155
33 + 50 = 83
150 + 32 = 182
141 - 116 = 25
3 + 60 = 63
261 - 238 = 23
150 + 113 = 263
226 - 132 = 94