Question

5. The sum of 2 cm 7mm and 9cm 9mm is​

Answer 1

Answer:

10cm 6mm

Step-by-step explanation:

We have to find the sum of 2cm 7mm and 9cm 9mm.

2cm 7mm + 9cm 9mm

or, 9cm 16mm

or, 9cm (10+6)mm

or, 9cm + 10mm + 6mm

or, 9cm + 1cm + 6mm

or, 10cm 6mm

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Answer 2

Step-by-step explanation:

We know that 1 cm = 10 mm

2 cm = 2*10 mm

= 20 mm

2 cm 7 mm = 20 mm + 7 mm

= 27 mm

9 cm = 10*9 mm

= 90 mm

9 cm 9 mm = 90 mm + 9 mm

= 99 mm

2 cm 7 mm + 9 cm 9 mm

= (27 + 99) mm

= 126 mm

= 12 cm 6 mm