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)
244 - 120 = 124
274 - 134 = 140
109 + 98 = 207
175 - 174 = 1
28 + 81 = 109
55 + 54 = 109
259 - 223 = 36
125 + 93 = 218
186 + 29 = 215
36 + 3 = 39
61 + 160 = 221
264 - 62 = 202
108 - 42 = 66
213 - 47 = 166
90 + 14 = 104
56 + 80 = 136
263 - 251 = 12
36 + 60 = 96
114 + 77 = 191
125 + 54 = 179
265 - 149 = 116
164 + 78 = 242
133 - 9 = 124
82 + 19 = 101
200 + 73 = 273
276 - 254 = 22
191 + 71 = 262
42 + 74 = 116
114 + 79 = 193
270 - 80 = 190
227 + 26 = 253
169 - 25 = 144
248 - 15 = 233
73 - 6 = 67
114 - 107 = 7
53 - 25 = 28
191 - 180 = 11
136 + 143 = 279
57 + 59 = 116
21 + 151 = 172
62 + 130 = 192
139 + 31 = 170
1 + 40 = 41
60 - 19 = 41
270 - 36 = 234
240 - 92 = 148
101 + 31 = 132
55 + 149 = 204
227 - 44 = 183
60 + 64 = 124
126 + 104 = 230
65 + 111 = 176
50 + 201 = 251
240 - 94 = 146
207 + 10 = 217
258 - 115 = 143
62 + 209 = 271
58 + 169 = 227
18 + 132 = 150
75 - 29 = 46
26 + 170 = 196
165 - 55 = 110
216 - 30 = 186
188 - 74 = 114
94 + 119 = 213
150 - 8 = 142
258 - 191 = 67
79 + 52 = 131
112 + 36 = 148
110 - 12 = 98
21 + 238 = 259
26 + 69 = 95
55 + 142 = 197
245 - 25 = 220
29 + 120 = 149
31 + 236 = 267
265 - 66 = 199
152 + 21 = 173
2 + 34 = 36
32 + 95 = 127
271 - 118 = 153
199 - 113 = 86
207 - 159 = 48
226 + 14 = 240
217 + 50 = 267
236 - 80 = 156
104 - 29 = 75
146 + 98 = 244
51 + 65 = 116
46 + 76 = 122
5 + 112 = 117
160 + 100 = 260
143 - 125 = 18
64 + 206 = 270
129 + 63 = 192
80 + 61 = 141
77 + 15 = 92
249 - 58 = 191
60 + 118 = 178
119 + 111 = 230