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4
3
Example: Add km 547 m and km 473 m.
km m
Solution: Use ones, tens and hundreds columns to 1 1 1
write m and thousands column for km. 4 5 4 7
+ 3 4 7 3
Then add like the addition of numbers.
8 0 2 0
4 km 547 m + 3 km 473 m = 8 km 20 m

SUBTRACTION OF METRES AND CENTIMETRES m cm

Example: Subtract 26 m 75 cm from 42 m 54 cm. 3 11 14 14
4 2 5 4
Solution: Use ones and tens columns to write cm
+ 2 6 7 5
and hundreds columns to write on.

Then subtract like the subtraction of 1 5 7 9
numbers.

MENTAL MATHS-2

A. Add the following:

(a) m cm (b) m cm (c) m cm

5 3 8 3 4 3 8 5 4 7 2

+ 4 8 5 + 2 3 6 2 + 3 5 2 6

(d) m cm (e) m cm (f) m cm

2 4 3 7 5 4 6 4 6 7 4 7
+ 4 3 8 6 + 2 7 8 5 + 3 1 6 8

(g) (h) (i)
km m m m m m
3 4 3 7 5 6 2 3 4 8 2 4

+ 4 4 2 4 + 3 4 8 7 + 2 2 7 8

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Measurement
Mathematics-3