Question

Naresh walked 2 km 35 m in the morning and 1 km 7 m in the evening. How much distance did he walk in all?
[5 marks]

Answer 1

We know that 1000 m = 1 km
$\therefore 1m=\frac{1}{1000}km$
[0.5 marks]

$2km35m=2km+35m=2km+1m\times 35=2km+\frac{1}{1000}km\times 35=2.035km$
[1 mark]

$1km7m=1km+7m=1km+1m\times 7=1km+\frac{1}{1000}km\times 7=1.007km$
[1 mark]

Distance travelled in morning = 2 km 35 m = 2.035 km
Distance travelled in evening = 1 km 7 m = 1.007 km

$\begin{array}{cccccccc}\text{Hundreds}& \text{Tens}& \text{Ones}& .& \text{Tenths}& \text{Hundredths}& \text{Thousandths}& \\ 0& 0& 2& .& 0& 3& 5& \\ 0& 0& 1& .& 0& 0& 7& \\ +& & & & & & & \\ 0& 0& 3& .& 0& 4& 2& =3.042\end{array}$

[2 marks]

Therefore, total distance travelled by Naresh
= 2.035 km + 1.007 km
= 3.042 km
[0.5 marks]