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)
253 - 192 = 61
118 + 8 = 126
1 + 265 = 266
239 - 54 = 185
180 - 32 = 148
160 + 4 = 164
133 - 39 = 94
80 + 185 = 265
89 - 56 = 33
24 + 134 = 158
105 + 163 = 268
244 - 213 = 31
155 + 18 = 173
228 - 104 = 124
208 - 38 = 170
124 + 37 = 161
236 + 30 = 266
275 - 232 = 43
33 + 159 = 192
76 + 199 = 275
4 + 54 = 58
164 + 1 = 165
168 - 85 = 83
52 - 4 = 48
31 + 10 = 41
188 - 91 = 97
26 + 34 = 60
124 - 75 = 49
252 - 144 = 108
69 - 62 = 7
8 + 22 = 30
107 - 53 = 54
124 + 147 = 271
210 - 62 = 148
215 - 116 = 99
119 - 102 = 17
214 + 11 = 225
89 + 36 = 125
239 - 62 = 177
60 + 34 = 94
49 + 213 = 262
215 - 91 = 124
157 - 150 = 7
98 + 161 = 259
171 - 159 = 12
9 + 139 = 148
207 - 199 = 8
191 + 59 = 250
174 - 82 = 92
26 + 237 = 263
135 + 84 = 219
275 - 102 = 173
80 + 132 = 212
213 - 25 = 188
176 - 140 = 36
260 - 90 = 170
117 + 85 = 202
108 - 28 = 80
112 + 40 = 152
27 + 45 = 72
143 - 122 = 21
5 + 141 = 146
199 + 47 = 246
22 + 212 = 234
230 - 188 = 42
14 + 159 = 173
247 - 181 = 66
57 + 111 = 168
6 + 136 = 142
186 - 108 = 78
2 + 138 = 140
63 + 1 = 64
279 - 170 = 109
115 + 12 = 127
167 - 23 = 144
162 - 157 = 5
112 - 108 = 4
217 - 179 = 38
94 - 65 = 29
1 + 276 = 277
101 + 75 = 176
232 - 83 = 149
40 + 235 = 275
21 + 210 = 231
130 + 139 = 269
123 - 94 = 29
201 - 111 = 90
81 + 122 = 203
167 - 41 = 126
146 - 143 = 3
31 + 88 = 119
15 + 189 = 204
268 - 208 = 60
12 + 96 = 108
83 + 75 = 158
166 - 93 = 73
111 + 55 = 166
20 + 56 = 76
97 - 56 = 41
264 - 113 = 151