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)
265 - 178 = 87
42 - 15 = 27
256 - 42 = 214
182 + 84 = 266
250 - 137 = 113
134 + 61 = 195
277 - 76 = 201
74 + 11 = 85
22 + 168 = 190
224 - 55 = 169
212 - 82 = 130
55 + 182 = 237
130 + 133 = 263
275 - 226 = 49
4 + 233 = 237
46 + 93 = 139
219 + 30 = 249
271 - 8 = 263
54 + 153 = 207
120 + 24 = 144
254 - 38 = 216
56 + 54 = 110
74 + 89 = 163
114 + 137 = 251
67 + 210 = 277
231 - 183 = 48
60 + 93 = 153
221 - 58 = 163
165 + 17 = 182
146 + 38 = 184
22 + 183 = 205
10 + 103 = 113
72 + 138 = 210
123 - 73 = 50
90 + 6 = 96
49 + 21 = 70
272 - 133 = 139
12 + 37 = 49
237 - 52 = 185
15 + 95 = 110
186 - 29 = 157
48 + 116 = 164
83 + 188 = 271
68 - 51 = 17
209 + 57 = 266
20 + 33 = 53
186 - 71 = 115
78 + 193 = 271
70 + 86 = 156
214 - 197 = 17
17 + 124 = 141
217 - 216 = 1
166 - 37 = 129
142 - 32 = 110
254 - 120 = 134
88 - 75 = 13
58 - 16 = 42
143 + 123 = 266
227 - 136 = 91
67 + 187 = 254
215 - 52 = 163
124 + 36 = 160
205 - 30 = 175
56 + 65 = 121
202 - 124 = 78
4 + 235 = 239
236 + 8 = 244
207 - 1 = 206
269 - 78 = 191
235 - 228 = 7
138 + 72 = 210
64 + 136 = 200
214 + 62 = 276
97 + 11 = 108
47 + 32 = 79
63 + 212 = 275
89 + 121 = 210
42 + 112 = 154
21 + 215 = 236
90 + 168 = 258
22 + 64 = 86
259 - 199 = 60
19 + 147 = 166
215 + 27 = 242
209 - 185 = 24
210 - 78 = 132
140 + 39 = 179
247 - 128 = 119
99 - 91 = 8
82 + 28 = 110
179 - 171 = 8
247 - 64 = 183
53 + 188 = 241
81 - 10 = 71
236 - 146 = 90
236 - 194 = 42
17 + 115 = 132
238 - 71 = 167
102 + 159 = 261
63 - 12 = 51