15. Вычислите: 713 × 6; 328 × 7; 674 × 3; 187 × 4; 812 × 5; 625 × 3; 473 × 4; 193 × 6; 162 × 9; 873 × 3; 278 × 7; 145 × 5; 824 × 5; 392 × 4; 295 × 6; 158 × 7.
- \(713 \cdot 6 = 4278\);
- \(328 \cdot 7 = 2296\);
- \(674 \cdot 3 = 2022\);
- \(187 \cdot 4 = 748\);
- \(812 \cdot 5 = 4060\);
- \(625 \cdot 3 = 1875\);
- \(473 \cdot 4 = 1892\);
- \(193 \cdot 6 = 1158\);
- \(162 \cdot 9 = 1458\);
- \(873 \cdot 3 = 2619\);
- \(278 \cdot 7 = 1946\);
- \(145 \cdot 5 = 725\);
- \(824 \cdot 5 = 4120\);
- \(392 \cdot 4 = 1568\);
- \(295 \cdot 6 = 1770\);
- \(158 \cdot 7 = 1106\).