б) Выполни умножение: 8300 × 4; 2800 × 8; 68000 × 9; 75200 × 2.

8300 × 4 = 83 × 4 × 100 = 332 × 100 = 33200.

2800 × 8 = 28 × 8 × 100 = 224 × 100 = 22400.

68000 × 9 = 68 × 9 × 1000 = 612 × 1000 = 612000.

75200 × 2 = 752 × 2 × 100 = 1504 × 100 = 150400.