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)
68 + 135 = 203
115 - 52 = 63
273 - 235 = 38
278 - 116 = 162
92 + 174 = 266
51 + 112 = 163
273 - 219 = 54
54 - 7 = 47
142 + 121 = 263
187 - 171 = 16
273 - 231 = 42
112 + 98 = 210
19 + 217 = 236
183 - 85 = 98
46 + 14 = 60
178 + 35 = 213
198 - 166 = 32
253 - 205 = 48
262 - 146 = 116
270 - 168 = 102
118 + 37 = 155
146 - 38 = 108
34 + 142 = 176
179 - 6 = 173
234 - 154 = 80
94 - 45 = 49
49 + 229 = 278
195 - 123 = 72
12 + 194 = 206
181 - 13 = 168
34 + 209 = 243
226 - 113 = 113
83 + 131 = 214
7 - 3 = 4
274 - 239 = 35
104 + 82 = 186
180 - 22 = 158
201 - 86 = 115
127 + 103 = 230
1 + 220 = 221
136 - 58 = 78
145 - 99 = 46
52 + 127 = 179
67 + 77 = 144
279 - 88 = 191
113 - 37 = 76
40 - 8 = 32
24 + 23 = 47
17 + 16 = 33
119 + 111 = 230
184 - 48 = 136
26 + 151 = 177
84 + 165 = 249
86 - 44 = 42
163 - 127 = 36
271 - 163 = 108
54 - 35 = 19
48 + 218 = 266
62 + 13 = 75
251 - 16 = 235
177 - 43 = 134
101 + 122 = 223
155 - 154 = 1
214 + 33 = 247
256 - 5 = 251
73 + 65 = 138
100 + 171 = 271
96 + 80 = 176
23 + 39 = 62
165 - 135 = 30
275 - 93 = 182
20 + 202 = 222
24 + 117 = 141
184 - 8 = 176
244 - 90 = 154
88 - 26 = 62
180 + 58 = 238
58 + 43 = 101
75 + 69 = 144
266 - 57 = 209
173 - 99 = 74
73 + 111 = 184
169 + 45 = 214
223 - 135 = 88
238 - 61 = 177
143 + 80 = 223
241 - 131 = 110
29 + 200 = 229
255 - 192 = 63
248 - 247 = 1
95 - 26 = 69
98 + 158 = 256
176 - 78 = 98
276 - 185 = 91
7 + 193 = 200
223 - 69 = 154
185 - 94 = 91
141 - 91 = 50
95 - 30 = 65
189 - 55 = 134