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)
247 - 193 = 54
110 + 17 = 127
230 - 142 = 88
254 + 10 = 264
140 + 106 = 246
191 + 4 = 195
22 + 124 = 146
159 - 94 = 65
30 + 176 = 206
26 - 12 = 14
267 - 129 = 138
44 - 16 = 28
202 - 66 = 136
136 - 101 = 35
202 - 43 = 159
193 - 46 = 147
212 - 109 = 103
155 + 25 = 180
75 + 100 = 175
84 - 7 = 77
274 - 162 = 112
263 - 66 = 197
269 - 115 = 154
214 - 122 = 92
213 - 92 = 121
216 - 29 = 187
39 + 99 = 138
216 - 161 = 55
72 + 159 = 231
180 - 154 = 26
167 - 31 = 136
258 - 173 = 85
61 + 90 = 151
21 + 63 = 84
208 + 47 = 255
137 + 1 = 138
263 - 141 = 122
224 - 14 = 210
107 + 12 = 119
129 + 99 = 228
221 - 83 = 138
15 + 77 = 92
257 - 34 = 223
165 - 136 = 29
19 + 217 = 236
204 + 17 = 221
222 - 154 = 68
28 + 64 = 92
17 + 1 = 18
139 - 5 = 134
176 - 87 = 89
185 + 64 = 249
240 - 127 = 113
247 - 204 = 43
171 - 58 = 113
59 + 214 = 273
48 + 105 = 153
237 + 23 = 260
156 - 85 = 71
195 - 62 = 133
145 - 31 = 114
185 + 93 = 278
182 - 86 = 96
99 + 89 = 188
104 - 23 = 81
235 - 103 = 132
273 - 46 = 227
201 - 26 = 175
42 + 153 = 195
101 + 109 = 210
194 - 147 = 47
92 + 37 = 129
51 + 57 = 108
195 - 66 = 129
67 + 130 = 197
255 - 234 = 21
34 + 199 = 233
278 - 88 = 190
211 - 68 = 143
133 + 76 = 209
32 + 72 = 104
70 + 37 = 107
136 + 14 = 150
85 + 88 = 173
173 - 172 = 1
19 + 260 = 279
6 + 196 = 202
86 - 83 = 3
99 + 126 = 225
136 - 112 = 24
37 + 53 = 90
123 + 104 = 227
60 + 46 = 106
272 - 96 = 176
6 + 167 = 173
72 + 191 = 263
223 + 31 = 254
6 + 138 = 144
37 + 31 = 68
245 - 72 = 173