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)
8 + 9 = 17
52 + 121 = 173
96 + 9 = 105
241 - 29 = 212
67 + 129 = 196
42 + 66 = 108
114 + 32 = 146
127 - 115 = 12
280 - 148 = 132
203 - 121 = 82
161 + 8 = 169
72 - 9 = 63
134 + 93 = 227
98 - 59 = 39
200 - 142 = 58
138 + 5 = 143
15 + 236 = 251
78 + 199 = 277
137 + 77 = 214
233 + 40 = 273
80 - 78 = 2
97 + 35 = 132
144 + 51 = 195
101 + 141 = 242
248 - 56 = 192
235 - 229 = 6
207 - 204 = 3
115 + 75 = 190
212 - 174 = 38
10 + 20 = 30
77 + 153 = 230
157 - 119 = 38
125 - 74 = 51
14 + 114 = 128
90 + 61 = 151
278 - 236 = 42
64 - 27 = 37
271 - 190 = 81
273 - 260 = 13
108 + 80 = 188
100 + 50 = 150
184 + 88 = 272
82 + 26 = 108
29 - 28 = 1
168 - 162 = 6
181 - 158 = 23
81 + 77 = 158
199 - 171 = 28
207 - 15 = 192
144 + 49 = 193
238 - 37 = 201
267 - 57 = 210
52 - 31 = 21
264 - 221 = 43
182 + 71 = 253
20 + 211 = 231
108 - 95 = 13
80 + 84 = 164
256 - 242 = 14
43 + 154 = 197
9 + 100 = 109
245 - 51 = 194
180 + 5 = 185
216 + 40 = 256
253 - 36 = 217
212 + 43 = 255
216 + 51 = 267
267 - 120 = 147
93 - 10 = 83
117 - 88 = 29
29 + 9 = 38
107 + 31 = 138
35 + 122 = 157
51 - 13 = 38
78 + 148 = 226
273 - 12 = 261
48 + 7 = 55
277 - 206 = 71
148 + 9 = 157
217 - 173 = 44
214 + 8 = 222
74 + 15 = 89
149 + 90 = 239
113 + 158 = 271
143 - 54 = 89
250 - 111 = 139
272 + 4 = 276
4 + 162 = 166
100 + 147 = 247
160 - 150 = 10
93 + 15 = 108
165 - 155 = 10
198 + 8 = 206
122 + 77 = 199
86 + 135 = 221
174 + 71 = 245
145 + 23 = 168
167 + 33 = 200
254 + 10 = 264
148 - 71 = 77