10.9
420.0
You would round it down to the nearest tenth, 4.5.
2.4 is rounded down to 2.3 * * * * * 2.4, to the nearest tenth, is 2.4!
3.5
Rounded down to the nearest tenth, 43.7002 is equal to 43.7.
5.1
0.3
0.4
0.4 is equal to 4/10, or four tenths. No further rounding is required - it is already rounded down to the nearest tenth.
Rounded down to the nearest tenth, 13.4256 is approximately equal to 13.4, or 13 and four tenths.
70.1