(a) 4 cm = 40 mm, so 4 cm 5 mm = 40 + 5 = 45 mm (b) 89 ÷ 10 = 8 remainder 9, so 89 mm = 8 cm 9 mm (c) $234 \times 10$ = 2,340 mm (d) 514 ÷ 10 = 51 remainder 4, so 514 mm = 51 cm 4 mm (e) 6 m = 600 cm, so 6 m 34 cm = 600 + 34 = 634 cm (f) 20 m = 2,000 cm, so 20 m 12 cm = 2,000 + 12 = 2,012 cm (g) $397 \times 100$ = 39,700 cm (h) 5,792 ÷ 100 = 57 remainder 92, so 5,792 cm = 57 m 92 cm (i) 9,108 ÷ 100 = 91 remainder 8, so 9,108 cm = 91 m 8 cm (j) $34 \times 1$,000 = 34,000 m (k) 6,870 ÷ 1,000 = 6 remainder 870, so 6,870 m = 6 km 870 m (l) 10,552 ÷ 1,000 = 10 remainder 552, so 10,552 m = 10 km 552 m (m) 29 km = 29,000 m, so 29 km 30 m = 29,000 + 30 = 29,030 m (n) 32 km = 32,000 m, so 32 km 359 m = 32,000 + 359 = 32,359 m