Question

6. Express the following as cm using decimal:
(a) 2 mm
(c) 126 mm
(d) 175 mm
(b) 30 mm
(d) 14 cm 2 mm
(f) 20 cm 6 mm.​

Answer 1

Answer:

0.2cm

12.6cm

17.5cm

30mm- 3.0cm

14.2cm

20.6mm

Step-by-step explanation:

Answer 2

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• 2 mm = 0.2 cm

2 mm = 2 × 1 mm

=> 2 × 1/10 cm

=> 2/10 cm = 02/10 cm

=> 0.2 cm

• 126 mm = 12.6 cm

126 mm = 126 × 1 mm

=> 126 × 1/10 cm

=> 126/10 cm = 12.6 cm

• 175 mm = 17.5 cm

175 mm = 375 × 1 mm

=> 175 × 1/10 cm

=> 175/10 cm = 17.5 cm

• 30 mm = 3.0 cm

30 mm = 30 × 1 mm

=> 30 × 1/10 cm

=> 30/10 cm = 3.0 cm

• 14 cm, 2 mm = 14.2 cm

14 cm, 2 mm = 4 cm + 2 mm

=> 4 cm + 2 × 1/10 cm

=> ( 14 + 2/10 ) cm

=> ( 14 × 10 × 2/10 ) cm = 140 + 2/10 cm

=> 142/10 cm = 14.2 cm

• 20 cm, 6 mm = 20.6 cm

20 cm, 6 mm = 20 cm + 6 mm

=> 20 cm + 6 × 1/10 cm

=> ( 20 + 6/10 ) cm

=> ( 20 × 10 × 6/10 ) cm = 120 + 6/10 cm

=> 126/10 cm = 12.6 cm