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)
274 - 161 = 113
271 - 9 = 262
241 - 88 = 153
253 - 169 = 84
167 + 5 = 172
113 - 20 = 93
108 - 47 = 61
3 + 185 = 188
91 + 152 = 243
44 + 157 = 201
99 - 96 = 3
155 + 109 = 264
45 + 149 = 194
159 - 54 = 105
187 + 63 = 250
151 + 2 = 153
261 - 201 = 60
30 + 44 = 74
216 + 11 = 227
103 + 176 = 279
271 - 249 = 22
90 + 45 = 135
243 - 9 = 234
229 - 203 = 26
196 - 84 = 112
125 - 57 = 68
91 - 12 = 79
8 + 228 = 236
160 - 33 = 127
163 + 16 = 179
79 + 151 = 230
54 - 13 = 41
81 + 182 = 263
127 - 19 = 108
275 - 4 = 271
101 + 148 = 249
128 + 61 = 189
264 - 248 = 16
225 - 71 = 154
104 + 98 = 202
243 - 239 = 4
1 + 28 = 29
29 + 73 = 102
211 - 146 = 65
110 + 132 = 242
73 + 202 = 275
141 + 43 = 184
99 + 110 = 209
76 + 16 = 92
258 - 42 = 216
65 + 131 = 196
253 + 8 = 261
186 - 77 = 109
69 + 116 = 185
193 - 185 = 8
222 - 32 = 190
137 - 72 = 65
10 + 1 = 11
185 + 90 = 275
191 - 21 = 170
54 + 7 = 61
180 + 83 = 263
149 + 106 = 255
61 - 16 = 45
49 + 199 = 248
82 + 132 = 214
93 + 125 = 218
33 - 19 = 14
91 + 151 = 242
143 + 75 = 218
85 - 30 = 55
233 + 16 = 249
48 + 205 = 253
78 - 13 = 65
190 - 183 = 7
81 + 184 = 265
255 - 17 = 238
152 + 55 = 207
51 + 40 = 91
133 + 80 = 213
124 + 88 = 212
32 + 192 = 224
106 + 138 = 244
169 - 167 = 2
213 - 57 = 156
216 + 1 = 217
194 - 46 = 148
137 - 13 = 124
101 - 79 = 22
225 - 27 = 198
91 + 134 = 225
160 - 54 = 106
280 - 253 = 27
54 + 134 = 188
194 - 15 = 179
43 + 53 = 96
150 + 33 = 183
239 - 160 = 79
53 + 25 = 78
106 + 157 = 263