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)
64 + 115 = 179
77 - 31 = 46
275 - 138 = 137
267 - 124 = 143
251 - 194 = 57
110 - 23 = 87
279 - 184 = 95
9 + 7 = 16
180 - 170 = 10
50 + 42 = 92
253 - 66 = 187
34 + 134 = 168
27 + 52 = 79
118 - 65 = 53
262 - 11 = 251
105 + 138 = 243
261 - 122 = 139
65 + 43 = 108
88 + 19 = 107
32 + 43 = 75
138 - 63 = 75
32 + 199 = 231
29 + 189 = 218
147 - 54 = 93
83 - 67 = 16
229 + 4 = 233
224 - 16 = 208
236 + 13 = 249
219 + 29 = 248
127 + 13 = 140
275 - 157 = 118
173 - 85 = 88
147 + 16 = 163
118 - 69 = 49
133 + 49 = 182
198 - 100 = 98
268 - 228 = 40
231 - 51 = 180
213 - 64 = 149
268 - 220 = 48
279 - 272 = 7
212 - 96 = 116
270 - 188 = 82
130 + 65 = 195
111 + 148 = 259
31 + 28 = 59
232 - 110 = 122
208 - 187 = 21
150 + 125 = 275
42 + 127 = 169
152 + 97 = 249
2 + 178 = 180
261 - 20 = 241
214 - 131 = 83
18 + 110 = 128
169 - 20 = 149
19 + 201 = 220
131 - 114 = 17
154 + 79 = 233
63 + 42 = 105
3 + 221 = 224
166 - 113 = 53
12 + 128 = 140
208 - 35 = 173
91 + 150 = 241
278 - 242 = 36
218 - 36 = 182
236 - 36 = 200
273 - 260 = 13
21 + 32 = 53
129 + 35 = 164
12 + 170 = 182
50 - 38 = 12
97 + 151 = 248
59 - 56 = 3
265 - 156 = 109
47 + 19 = 66
38 + 11 = 49
239 + 11 = 250
155 + 88 = 243
71 + 113 = 184
217 - 30 = 187
7 + 166 = 173
150 + 27 = 177
100 + 133 = 233
97 - 75 = 22
123 + 26 = 149
173 - 125 = 48
50 + 46 = 96
101 - 43 = 58
11 + 109 = 120
220 - 63 = 157
170 + 18 = 188
83 + 32 = 115
56 + 174 = 230
166 + 89 = 255
62 + 201 = 263
260 - 235 = 25
92 + 16 = 108
18 + 206 = 224