45 + 123 = ?, 178, 168, 158, 188, 67 + 245 = ?, 312, 302, 322, 292, 89 + 106 = ?, 185, 205, 175, 195, 34 + 421 = ?, 445, 475, 455, 465, 156 - 42 = ?, 104, 124, 114, 134, 238 - 57 = ?, 201, 191, 171, 181, 305 - 68 = ?, 217, 237, 227, 247, 490 - 35 = ?, 455, 465, 435, 445, 23 × 104 = ?, 2392, 2292, 2192, 2492, 31 × 112 = ?, 3372, 3472, 3672, 3572, 45 × 103 = ?, 4435, 4735, 4635, 4535, 52 × 121 = ?, 6392, 6192, 6492, 6292, 144 ÷ 12 = ?, 12, 10, 16, 14, 288 ÷ 24 = ?, 18, 16, 12, 14, 336 ÷ 48 = ?, 9, 8, 6, 7, 225 ÷ 15 = ?, 10, 15, 12, 18, 58 + 307 = ?, 345, 355, 365, 375, 412 - 29 = ?, 383, 363, 373, 393, 26 × 105 = ?, 2630, 2730, 2530, 2830, 198 ÷ 18 = ?, 9, 10, 12, 11
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