Round 43.18 cm to the nearest tenth of a centimetre, and to the nearest centimetre? ?

To the nearest tenth of a centimetre = 43.2cm

This is because you have .18, and 8 rounds up (it's above 5), so it would round up to the next consecutive tenth of a centimetre.

To the nearest centimetre = 43cm.

This is because 43.18 is underneath 43.5, which means it rounds down.