Page 186 - Start Up Mathematics_1

Quick Tip

While adding cm if the total is 100 cm or more than 100 cm, take 1 to metre’s
column as 100 cm = 1 m. For example, add 1 m 70 cm and 35 cm.

m cm
Step 1: Add the centimetres.
1 70
70 + 35 = 105
+ 35 Since 100 cm = 1 m

105 Carry over 1 to m column.

m cm
1 Step 2: Add the metres.
1 70
1 + 1 = 2
+ 35
So, 1 m 70 cm + 35 cm = 2 m 5 cm.
2 05

4 Solve these.

m cm m cm m cm
(a) (b) (c)
83 10 25 45 121 15

+ 62 30 – 11 20 + 39 78

m cm m cm m cm
(d) (e) (f)
58 95 99 65 347 92

– 24 32 + 35 43 – 103 30

m cm m cm m cm
(g) (h) (i)
25 49 141 83 401 25

+ 3 59 _ 49 96 + 109 65

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